Changes since v2 (Volar-ized Glint)

`glint` CLI binary

BREAKING CHANGE: closer unification with vanilla tsc
- glint is now a much more thin wrapper around tsc and requires a number of changes to the arguments passed to it to accomplish typical tasks
  - When in doubt, think in terms of what args tsc would need in order to accomplish a similar task, and pass those same args to glint
  - to type-check your code
    - before: glint
    - after: glint --noEmit
  - to build .d.ts declaration files for your .gts/.ts files
    - before: glint --build
    - after: glint --declaration --emitDeclarationOnly
BREAKING CHANGE: basename.gts.d.ts files emitted instead of basename.d.ts
- See discussion: #628
- Previously a basename.gts would emit a corresponding basename.d.ts file. For v2 glint, basename.gts.d.ts is emitted.