Feature: Share links (#3996)

* Implement share links

Basic implementation of share links

Make certain share link fields not editable, automatically grant permissions on migrate

Updated styling, error messages from expired / deleted links

frontend code linting, reversable sharelink migration

testing coverage

Update translation strings

No links message

* Consolidate file response methods

* improvements to share links on mobile devices

* Refactor share links file_version

* Add docs for share links

* Apply suggestions from code review

* When filtering share links, use the timezone aware now()

* Removes extra call to setup directories for usage in testing

* FIx copied badge display on some browsers

* Move copy to ngx-clipboard library

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Co-authored-by: Trenton H <797416+stumpylog@users.noreply.github.com>

src/documents/templates/registration/logged_out.html

@@ -8,7 +8,7 @@
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
     <meta name="description" content="Paperless-ngx Signed Out">
-    <meta name="author" content="The Paperless-ngx Team">
+    <meta name="author" content="Paperless-ngx project and contributors">
     <meta name="robots" content="noindex,nofollow">
 
     <title>{% translate "Paperless-ngx signed out" %}</title>