* 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>

Signed-off-by: Still Hsu <5843208+Still34@users.noreply.github.com>

Signed-off-by: Still Hsu <5843208+Still34@users.noreply.github.com>

Signed-off-by: Still Hsu <5843208+Still34@users.noreply.github.com>

Signed-off-by: Still Hsu <5843208+Still34@users.noreply.github.com>

* Fix: HasAllMembers is false if a user left

* Fix: Correct boolean logic

* Update SocketGuild.cs

* Fix returns value docs

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

Co-authored-by: Still Hsu <dev@stillu.cc>

The inherited summary incorrectly stated that all users who _see_ the channel are returned when in reality only the ones _connected_ are.

* Add inline replies

* Missed a few things

* Change xml docs, IUserMessage, and other changes

* Missed one when changing

* Fix referencedMessage author

* Send presence on identify

* Change CurrentUser presence

* Implement gateway ratelimit

* Remove unused code

* Share WebSocketRequestQueue between clients

* Add global limit and a way to change gateway limits

* Refactoring variable to fit lib standards

* Update xml docs

* Update xml docs

* Move warning to remarks

* Remove specific RequestQueue for WebSocket and other changes

The only account limit is for identify that is dealt in a different way (exclusive semaphore), so websocket queues can be shared with REST and don't need to be shared between clients anymore.

Also added the ratelimit for presence updates.

* Add summary to IdentifySemaphoreName

* Fix spacing

* Add max_concurrency and other fixes

- Add session_start_limit to GetBotGatewayResponse
- Add GetBotGatewayAsync to IDiscordClient
- Add master/slave semaphores to enable concurrency
- Not store semaphore name as static
- Clone GatewayLimits when cloning the Config

* Add missing RequestQueue parameter and wrong nullable

* Add RequeueQueue paramater to Webhook

* Better xml documentation

* Remove GatewayLimits class and other changes

- Remove GatewayLimits
- Transfer a few properties to DiscordSocketConfig
- Remove unnecessary usings

* Remove unnecessary using and wording

* Remove more unnecessary usings

* Change named Semaphores to SemaphoreSlim

* Remove unused using

* Update branch

* Fix merge conflicts and update to new ratelimit

* Fixing merge, ignore limit for heartbeat, and dispose

* Missed one place and better xml docs.

* Wait identify before opening the connection

* Only request identify ticket when needed

* Move identify control to sharded client

* Better description for IdentifyMaxConcurrency

* Add lock to InvalidSession