MESSAGE_REACTION_REMOVE_EMOJI events were triggering REST calls by invoking `RemoveAllReactionsForEmoteAsync` instead of `RemoveReactionsForEmote`, the latter being to handle cached message state cleanup.

* Scaffold Add/Remove roles by id. (needs impl & docs)

* Add docs

* Add implementation

* Expose Add/Remove role endpoints

* Formatting

* Fix wrong method call

When adding a type reader that replaces a default type reader,
CommandService checks that it replaces a type in its default type
readers or entity type readers (IMessage, IChannel, IRole, IUser). For
entity types, it checks that the target type is the same as the entity
type or it implements its type reader. Adding a type reader for a
default type reader doesn't make much sense and the original intent was
likely to check that the target type is or implements the entity type.

* Add guild member property for reaction

* Use the guild member provided by the event when present

```diff
--- geenrated
+++ generated
```

`Uri.IsWellFormedUriString()` doesn't return the expected result for specific urls, removed until the DotNet team actually resolves it ( https://github.com/dotnet/runtime/issues/21626 )

* feature: Webhook message edit & delete functionality

* PR fixes: Rename Edit* to Modify*; Add more detailed docstrings; Small validation fixes

* Fix spacing around docstrings

* Make ModifyWebhookMessageParams.Content Optional<string>

* Change the Webhook message edit functionality to use a object delegate method instead providing the all parameters

Co-authored-by: Desmont <desmont@users.noreply.github.com>

* Throw exception with CustomStatus

* Add remark instead of exception

* Change wording

Fix breaking change introduced by #1521

* fixed a deadlock in DiscordShardedClient during a failed Identify due to InvalidSession

* fixed log

* Don't wait ready before releasing semaphore

Co-authored-by: Paulo <pnmanjos@hotmail.com>

* Implemented Pending property

* Implemented changes

* feature: Add MessageFlags and AllowedMentions to Modify

* Change exception message

* fixes #1495

* keep obsolete properties and return types for compatibility

* missing properties for SocketInvite

* Restore xml docs and change obsolete message

Co-authored-by: Paulo <pnmanjos@hotmail.com>

Signed-off-by: Still Hsu <dev@stillu.cc>