* compute All

* implement rest endpoints

* JSON representation

* implement core representation

* handle stage channels

* Apply suggestions

Co-authored-by: BartArys <mysterybtdn@gmail.com>

* Remove duplicated factory function
Co-authored-by: BartArys <mysterybtdn@gmail.com>

* add documentation

* Document the requestToSpeak variable

Co-authored-by: BartArys <mysterybtdn@gmail.com>

As per Discord's documentation: discord/discord-api-docs#2789

* Do not octuple bitset size on copy

the pure plus and minus function create a new array to work with, this incorrectly created an array of a size equal to the amount of bits that were allocated, instead the amount of longs. Thus, octupling the internal size.

* Optimize Permission All

The All Permission folded each DiscordBitSet of each value into eachother, resulting in n + 1 bitsets being created. This commit changes that to use the internal `add` which instead, which only mutates the single bitset created.

* Add Stream permission

It was missing

* Add Permission All regression tests

* Expose the creation of application commands behavior

* Fix type of emitted event

* Expose the creation of application commands behavior

* Make message types sealed

* make Unknown a class

* Add missing message types

* make MessageTypeSerializer internal

* Add buttons to Activity

* Also pass buttons in constructor

* Add missing fields to Guild
- Add welcome_screen
- Add nsfw

* Fix failing tests

* Fix another failing tests

# Conflicts:
#	core/src/test/kotlin/performance/KordEventDropTest.kt
#	gateway/src/test/kotlin/json/CommandTest.kt