feat(analyzers): recognize NestJS projects

[aolin480]

Note

This PR currently includes files from the Hugging Face/reranker fix branch because it is stacked on top of bugfix/huggingface-fix. The Hugging Face PR needs to be merged into the primary repository first: PatrickSys/codebase-context#125.

Summary

• Add a NestJS analyzer for controllers, providers, modules, guards, pipes, interceptors, filters, repositories, and common Nest testing patterns.
• Update the analyzer registry and framework metadata so NestJS can be selected alongside the existing framework analyzers.
• Refresh React and Next.js analyzer detection with current project patterns and add regression coverage for the updated indicators.
• Make the searchable chunk limit configurable per project while keeping 5,000 as the default.

Large repository indexing

While indexing a large Nx monorepo project, Codebase Context created more than 22,000 chunks but only kept the first 5,000 in both the semantic and keyword indexes. The limit was hardcoded in CodebaseIndexer, so increasing chunk size would not fix the missing search coverage.

This adds projects[].parsing.maxChunks to ~/.codebase-context/config.json:

{
  "projects": [
    {
      "root": "/path/to/large-project",
      "parsing": {
        "maxChunks": 25000
      }
    }
  ]
}

The default stays at 5,000 for smaller projects. A project can raise the limit when it has enough files to exceed that safety cap. The value is validated as a positive integer and is used by both indexing paths:

• MCP server indexing loads the project setting through its runtime overrides.
• codebase-context reindex resolves the current root against the same server config.
• Semantic embeddings and the keyword index use the same resolved limit, so they keep matching coverage.

Verification

• pnpm build
• pnpm format:check
• pnpm test — 624 tests passed across 87 files
• Focused server-config and indexer tests — 20 tests passed
• Verified the installed CLI resolves the configured large-project root to maxChunks: 25000
• Smoke-tested React, Next.js, and NestJS analyzer behavior against local projects before splitting this branch

Notes

• This PR is stacked on top of bugfix/huggingface-fix and should be reviewed after the Hugging Face/reranker branch lands upstream.
• The analyzer examples are framework usage signals only; they do not encode project-specific behavior.
• Raising maxChunks increases embedding time, memory use, and local index size. The override is intentionally per project rather than a larger global default.