[Enhancement] Add Kukui and Mustard as Champions and Colress as an admin.

[Blitz425]

What are the changes the user will see?

New Champions for the Alola / Galar Elite 4!
Colress is a new admin, replacing Rood.

Why am I making these changes?

Adds more trainer variety to the game and characters like Kukui and Colress were requested characters to be added. Rood didn't make any sense as an admin for Team Plasma, as we're using Team Plasma's BW2 iteration and Rood is long retired and heavily against Team Plasma (and really only has one canonical battle so there is no variety to choose from). Mustard is a champion from Galar similar to Red who held the champion title in the past but still shows up here as a champion. The inclusion of this trainer introduces new and unique Pokemon to fight against such as G-Max Urshifu and is a good inclusion in the case we wish to do anything related to multi battles.

What are the changes from a developer perspective?

Added a new pool for Colress to pull from in his admin fights.
Added champion team data for Kukui / Mustard.

Screenshots/Videos

How to test the changes?

Overrides

Checklist

• I'm using beta as my base branch
• There is no overlap with another PR?
• The PR is self-contained and cannot be split into smaller PRs?
• Have I provided a clear explanation of the changes?
• Have I tested the changes manually?
• Are all unit tests still passing? (npm run test)
  • Have I created new automated tests (npm run create-test) or updated existing tests related to the PR's changes?
• Have I provided screenshots/videos of the changes (if applicable)?
  • Have I made sure that any UI change works for both UI themes (default and legacy)?

Are there any localization additions or changes? If so:

• Has a locales PR been created on the locales repo?
  • If so, please leave a link to it here: Add Dialogue / Name / BGM data for new Trainers, remove and replace data for an old Trainer. pokerogue-locales#107
• Has the translation team been contacted for proofreading/translation?

[DayKev]

Wait I thought we already had Colress?

[Blitz425]

Wait I thought we already had Colress?

Nope, adding him was blocked by an ex contributor but his addition has been requested by others and it felt fitting since we're updating Plasma to fully be their BW2 iteration. Colress' sprite WAS sitting around in the files though just being unused.

[damocleas]

A locales update needs to happen at the same time as this PR or beta will not launch