[feature] opengraph meta tags (#806)

* f0x gitignore additions

* better meta title and descriptions

* user avatar icon for thread and profile meta tags

* use proper tag for image

* whitespace

* add noescapeAttr template function

* use ogMeta struct for opengraph

* maxOGDescriptionLength = 300

Co-authored-by: tsmethurst <tobi.smethurst@protonmail.com>

internal/web/base.go

@@ -37,5 +37,6 @@ func (m *Module) baseHandler(c *gin.Context) {
 
 	c.HTML(http.StatusOK, "index.tmpl", gin.H{
 		"instance": instance,
+		"ogMeta":   ogBase(instance),
 	})
 }