[Misc] Update credits (#4942)

* Create `CREDITS.md`

* Add categories

* added Firel biome

* Update README.md

Co-authored-by: Moka <[email protected]>

* Add Leparagon to Trainer Sprites

* Add balance team

* Update music credits for Andr06 (new Forest BGM)

* Add dev team and past contributors to credits

* Add link to wiki credits page for pokemon sprites

* Update indentation

* Update dev credits

* Add pancakes

* Add wormhood

* Add Mystery Event Sprites section in Art

Add Past Contributors section in Balance

* Standardize emojis to primary categories only

* Update Mystery Event Sprites section

* Fix typo

* Add wiki team

* Add Special Thanks section

Used for external contributors/community members that aren't part of
the main PokeRogue team

* Add Discord mod team

* Add Translation team

* Add External Tools section

* Update CREDITS.md

* Update CREDITS.md

* add missing é in Poké in various spot

* Add Red (iOS App) to External Tools section

* Update Red's credit

* Update art credits

* Update vari and kieran

---------

Co-authored-by: damocleas <[email protected]>
Co-authored-by: Moka <[email protected]>
Co-authored-by: Lugiad <[email protected]>
Co-authored-by: Moka <[email protected]>