[bugfix] Fix existing bio text showing as HTML (#531)

* fix existing bio text showing as HTML

- updated replaced mentions to include instance
- strips HTML from account source note in Verify handler
- update text formatter to use buffers for string writes

Signed-off-by: kim <grufwub@gmail.com>

* go away linter

Signed-off-by: kim <grufwub@gmail.com>

* change buf reset location, change html mention tags

Signed-off-by: kim <grufwub@gmail.com>

* reduce FindLinks code complexity

Signed-off-by: kim <grufwub@gmail.com>

* fix HTML to text conversion

Signed-off-by: kim <grufwub@gmail.com>

* Update internal/regexes/regexes.go

Co-authored-by: Mina Galić <mina.galic@puppet.com>

* use improved html2text lib with more options

Signed-off-by: kim <grufwub@gmail.com>

* fix to produce actual plaintext from html

Signed-off-by: kim <grufwub@gmail.com>

* fix span tags instead written as space

Signed-off-by: kim <grufwub@gmail.com>

* performance improvements to regex replacements, fix link replace logic for un-html-ing in the future

Signed-off-by: kim <grufwub@gmail.com>

* fix tag/mention replacements to use input string, fix link replace to not include scheme

Signed-off-by: kim <grufwub@gmail.com>

* use matched input string for link replace href text

Signed-off-by: kim <grufwub@gmail.com>

* remove unused code (to appease linter :sobs:)

Signed-off-by: kim <grufwub@gmail.com>

* improve hashtagFinger regex to be more compliant

Signed-off-by: kim <grufwub@gmail.com>

* update breakReplacer to include both unix and windows line endings

Signed-off-by: kim <grufwub@gmail.com>

* add NoteRaw field to Account to store plaintext account bio, add migration for this, set for sensitive accounts

Signed-off-by: kim <grufwub@gmail.com>

* drop unnecessary code

Signed-off-by: kim <grufwub@gmail.com>

* update text package tests to fix logic changes

Signed-off-by: kim <grufwub@gmail.com>

* add raw note content testing to account update and account verify

Signed-off-by: kim <grufwub@gmail.com>

* remove unused modules

Signed-off-by: kim <grufwub@gmail.com>

* fix emoji regex

Signed-off-by: kim <grufwub@gmail.com>

* fix replacement of hashtags

Signed-off-by: kim <grufwub@gmail.com>

* update code comment

Signed-off-by: kim <grufwub@gmail.com>

Co-authored-by: Mina Galić <mina.galic@puppet.com>

internal/cache/account.go

@@ -134,6 +134,7 @@ func copyAccount(account *gtsmodel.Account) *gtsmodel.Account {
 		DisplayName:             account.DisplayName,
 		Fields:                  account.Fields,
 		Note:                    account.Note,
+		NoteRaw:                 account.NoteRaw,
 		Memorial:                account.Memorial,
 		MovedToAccountID:        account.MovedToAccountID,
 		CreatedAt:               account.CreatedAt,