feat!: remove TypeScript experiment, use WASM-only implementation

What does this MR do and why?

Remove the TypeScript GLQL implementation that was added as an experiment in !257 (merged).

The Ruby gem (gitlab_query_language) requires no changes as it compiles Rust directly to native code.

BREAKING CHANGE: Bump minor version. The glqlTypescript feature flag is no longer supported. All queries now use the Rust/WASM version.

Related issue: Rollback Typescript migration experiment (#72) • Jiaan Louw • 18.10

Detailed breakdown

Changes:

• Delete TypeScript implementation (npm/src/analyzer, codegen, parser, transformer, types, utils, lib.ts, errors.ts, field_mapping.ts)
• Delete TypeScript tests (npm/tests/integration/, test_utils.ts)
• Simplify npm/src/index.ts to WASM-only path
• Remove glqlTypescript feature flag references
• Remove parsimmon dependency
• Remove TypeScript CI jobs (test-ts, coverage-ts, graphql-validate-ts)

How to set up and validate locally

Testing GLQL Changes Locally in GDK

NPM Package (@gitlab/query-language-rust)

1. In the GLQL repo, build the package:

   wasm-pack build --target web
   npm install
   npm run build

2. Link the package locally: npm link

3. In your GDK gitlab directory, link to the local package: npm link @gitlab/query-language-rust --legacy-peer-deps

4. Restart GDK frontend to pick up changes: gdk restart vite (or webpack if you're not using Vite)

5. To unlink when done testing:

   # In GDK gitlab directory
   npm unlink @gitlab/query-language-rust --legacy-peer-deps
   npm install  # Restore original package

   Note if you run into any Vite issues you can run this after unlink to be very thorough:

   gdk stop vite && rm -rf node_modules/.vite && yarn install --check-files && gdk start vite

Ruby Gem (gitlab_query_language)

1. In the GLQL repo, build the gem:

   cd glql_rb
   bundle install
   bundle exec rake compile

2. In your GDK gitlab directory, update Gemfile to your local glql/glql_rb dir: gem 'gitlab_query_language', path: '/path/to/glql/glql_rb'

3. Install the gem: bundle install

4. Restart GDK Rails to pick up changes: gdk restart rails

5. To revert when done testing and restore original Gemfile line and run: bundle install

Feature flag

1. In GDK ensure the glql_typescript is turned off at [GDK_HOST]/rails/features.

Note: This will be monolith feature flag and related code will be removed in a follow-up MR with the version bump.

Verification

Test GLQL functionality in the browser by:

1. Navigate to any page with GLQL support (e.g., a wiki page with a GLQL code block)
2. Open browser DevTools and verify no TypeScript feature flag errors
3. Confirm queries compile and execute correctly