[docs] add zh docs (#3507)

* [docs] add zh docs

* [docs] add lang dropdown

* [docs] update mkdocs zh config

* [docs] migrate assets

* [docs] update overrides dir in mkdocs zh config

* [docs] exclude locales director in main mkdocs config

* [docs] rename assets to public to avoid conflicting with template

* [docs] extra_css change followup

* [docs] add theme.palette.toggle.icon back into mkdocs zh config

* [docs] fix zh readme reference + migrate language-specific repo markdown to docs

* [docs] translate remaining repo docs + update reference

* [docs] update zh index.md reference

* [docs/zh] wording alignment

docs/user_guide/custom_css.md

@@ -14,7 +14,7 @@ This allows you to customize the appearance of your GoToSocial profile for users
 
 Here's a standard GoToSocial profile page:
 
-![A GoToSocial test profile page. The standard color scheme of grey, blue, and orange.](./../assets/cssstandard.png)
+![A GoToSocial test profile page. The standard color scheme of grey, blue, and orange.](./../public/cssstandard.png)
 
 Let's say we want the background color to be black instead of grey.
 
@@ -30,7 +30,7 @@ We then click on Save Profile Info.
 
 If we go back to our profile page and refresh the page, it now looks like this:
 
-![The same GoToSocial test profile page. The background is now black.](./../assets/cssblack.png)
+![The same GoToSocial test profile page. The background is now black.](./../public/cssblack.png)
 
 If we want to get really fancy, we can add an ombre effect to the background, by using the following CSS code instead:
 
@@ -42,7 +42,7 @@ If we want to get really fancy, we can add an ombre effect to the background, by
 
 After saving the css and refreshing the profile page, the profile now looks like this:
 
-![The same GoToSocial test profile page. The background now starts dark red and fades to purple further down the page.](./../assets/cssgradient.png)
+![The same GoToSocial test profile page. The background now starts dark red and fades to purple further down the page.](./../public/cssgradient.png)
 
 ## Accessibility
 

docs/user_guide/migration.md

@@ -53,7 +53,7 @@ To do this, you must first log in to the GoToSocial settings panel with your GoT
 
 From there, go to the "Migration" section, and look at the "Alias Account" subsection:
 
-![The Alias Account subsection, showing a filled-in account alias.](../assets/migration-aliasing.png)
+![The Alias Account subsection, showing a filled-in account alias.](../public/migration-aliasing.png)
 
 In the first free account alias box, enter the URL of the account you wish to move **from**. This indicates that the account you wish to move from belongs to you, ie., you are "also known as" the account.
 
@@ -65,7 +65,7 @@ Once you have created the account alias from your GoToSocial account, pointing b
 
 On Mastodon, the "Account migration" settings section looks something like this:
 
-![The Mastodon "Account migration" settings page.](../assets/migration-mastodon.png)
+![The Mastodon "Account migration" settings page.](../public/migration-mastodon.png)
 
 If you were moving to a GoToSocial account from a Mastodon account, you would fill in the "Handle of the new account" field with the `@[username]@[domain]` value of your GoToSocial account. For example, if your GoToSocial account has username "@someone" and it's on the instance "example.org", you would enter `@someone@example.org` here.
 

docs/user_guide/rss.md

@@ -2,7 +2,7 @@
 
 RSS stands for [Really Simple Syndication](https://en.wikipedia.org/wiki/RSS). It's a very well established standard for sharing content on the web. You might recognize the jolly orange RSS logo from your favorite news websites and blogs:
 
-![The orange RSS icon](../assets/rss.svg)
+![The orange RSS icon](../public/rss.svg)
 
 If you like, you can configure your GoToSocial account to expose an RSS feed of your posts to the web. This allows people to get regular updates about your posts even when they don't have a Fediverse account. This is great when you're using GoToSocial to create longer-form, blog style posts, and you want anyone to be able to read them easily.
 

docs/user_guide/settings.md

@@ -8,7 +8,7 @@ You will be prompted to log in with your email address and password after provid
 
 ## Profile
 
-![Screenshot of the profile section of the user settings interface, showing a preview of the avatar, header and display name, and providing form fields to change them](../assets/user-settings-profile-info.png)
+![Screenshot of the profile section of the user settings interface, showing a preview of the avatar, header and display name, and providing form fields to change them](../public/user-settings-profile-info.png)
 
 In the profile section you can change your display name, avatar and header images. You can also choose to enable manually approving follow requests, and opt-in to providing a public RSS feed of your posts.
 
@@ -184,7 +184,7 @@ This allows you to do things like:
 
 For example, the below image shows a policy for Public visibility posts that allows anyone to like or boost, but only allows followers, and people you follow, to reply.
 
-![Policy showing "Who can like" = "anyone", "Who can reply" = "followers" and "following", and "Who can boost" = "anyone".](../assets/user-settings-interaction-policy-1.png)
+![Policy showing "Who can like" = "anyone", "Who can reply" = "followers" and "following", and "Who can boost" = "anyone".](../public/user-settings-interaction-policy-1.png)
 
 Bear in mind that policies do not apply retroactively. Posts created after you've applied a default interaction policy will use that policy, but any post created before then will use whatever policy was the default when the post was created.
 
@@ -231,7 +231,7 @@ Please see the [migration document](./migration.md) for more information on movi
 
 In the export & import section, you can export data from your GoToSocial account, or import data into it.
 
-![The export/import page.](../assets/user-settings-export-import.png)
+![The export/import page.](../public/user-settings-export-import.png)
 
 ### Export