Change api generation

[acrantel]

API generation changes

• switch from typescript-jquery to typescript-fetch so that our generated enums can be strings.
• use snake_case in generated types instead of camelCase (to match what backend expects)
• various changes in backend files to make the generated schema more accurate

Frontend API client changes

• refactored api.ts and auth.ts into multiple files in utils/api.
• deleted some legacy functions (especially in compete.ts)
• made all our api functions use the generated library instead of jquery

Miscellaneous:

• changed the bat file for generating types: generate-types.bat
• updated our precommit hooks to exclude the types folder from formatting (see .pre-commit-config.yaml)
• deleted jquery from package.json

review requests

• You can ignore the types folder when reviewing these files.
• please check that the backend schema changes make sense / are accurate

[acrantel]

this PR is blocked by https://github.com/battlecode/galaxy/pull/671.

[n8kim1]

seems good, would wait for lowell though