Update

[CuttleFishJones8652]

• Update chailove.md

  Update ChaiLove documentation URL.

• Update ISSUE_TEMPLATE.md

  Minor change.

• Update softpatching.md

  Add core compatibility section.

• Update mkdocs.yml. Move neko_project_ii.md

  Remove Neko Project II from mkdocs.yml and move the doc to legacy directory.
  Kai is the better core so the regular one doesn't need a doc.

• Update mkdocs.yml

  Sort cores.

• Update remote_retropad.md

  Adjust wording.

• Update licenses.md

  Add Dummy core license URL.

• Update gearboy.md

  Minor change.

• Update retroachievements.md, nestopia_ue.md

  Nestopa UE supports achievements now.

• Update nside_balanced.md

  Update issue tracker URL.

• Update yabause.md, todo.md

  Sync Yabause with Core Template. Update its To-Do section.