feat: Complete forum channel implementation (#1636)

* Add ForumTag type

* Make emoji_name nullable

* Add forum tag fields

* Add missing attributes & create ForumTag

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* Fix typehint syntax

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Fix typehints

* Update discord/http.py

Co-authored-by: BobDotCom <71356958+BobDotCom@users.noreply.github.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Update channel.py

* Update channel.py

* Update forum tags

- Move available_tags to ForumChannel, turn type to `list[ForumTag]`
- Fix versionadded

* Implement ForumChannel.get_tag

* Add sort order, channel flags and total msg

* Fix typehints

* Update Thread.applied_tags

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Implement ForumChannel.requires_tag

* Implement Thread.is_pinned

* Update `versionadded`s in docstring

* Update SortOrder to match API values

* Implement default_sort_order

* Implement default_thread_rate_limit_per_user

* Add new fields to edit routes

* Rename default_thread_rate_limit_per_user

This will be called default_thread_slowmode_delay in Pycord.

* Seperate edit methods for text and forum channels

* Map default_thread_slowmode_delay to valid field

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Add require_tag field to ForumChannel.edit

* Parse available_tags to dicts in edit

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* fix: NameError due to TYPE_CHECKING imports

* feat: applied_tags field in Thread.edit

Co-authored-by: BobDotCom <71356958+BobDotCom@users.noreply.github.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Lala Sabathil <lala@pycord.dev>

discord/abc.py

@@ -400,6 +400,26 @@ async def _edit(
         except KeyError:
             pass
 
+        try:
+            options["default_thread_rate_limit_per_user"] = options.pop(
+                "default_thread_slowmode_delay"
+            )
+        except KeyError:
+            pass
+
+        try:
+            if options.pop("require_tag"):
+                options["flags"] = ChannelFlags.require_tag.flag
+        except KeyError:
+            pass
+
+        try:
+            options["available_tags"] = [
+                tag.to_dict() for tag in options.pop("available_tags")
+            ]
+        except KeyError:
+            pass
+
         try:
             rtc_region = options.pop("rtc_region")
         except KeyError: