Reduce npm deprecation noise and modernize build/te…

[esgn]

Close #66

Summary

This PR performs a focused build/test toolchain cleanup after the WFS stabilization work, with the goal of reducing install/build warning noise and improving maintainability without changing application behavior.

What changed

• audited current npm deprecation warnings and mapped each to direct vs transitive sources
• simplified the build pipeline by removing duplicate TypeScript compilation in build (mcp-build already runs tsc)
• migrated Jest config from jest.config.ts to jest.config.mjs (no behavior change, less tooling overhead)
• removed unused dev dependencies:
  • @types/cors
  • @types/supertest
  • geojson
  • ts-node
• added an override for babel-plugin-istanbul@^8.0.0 to remove old test-exclude@6 chain
  • this removes inflight@1.0.6 and glob@7.2.3
• modernized TS module resolution:
  • main config moved to module/moduleResolution: NodeNext
  • test config kept Jest-compatible via module: ESNext + moduleResolution: bundler
• fixed newly surfaced strict typing issues (noImplicitAny) in:
  • src/gpf/wfs-schema-catalog.ts
  • src/helpers/wfs_engine/properties.ts
• updated publish workflow hygiene:
  • actions/checkout@v4
  • npm ci instead of npm install

Validation

• npm run typecheck ✅
• npm run build ✅
• npm test ✅ (19 suites, 106 tests)

Warning impact

Clean install warning count reduced from 4 -> 2 (npm ci --ignore-scripts).

Removed:

• inflight@1.0.6
• glob@7.2.3

Remaining:

• glob@10.5.0 (Jest 30 transitive chain)
• node-domexception@1.0.0 (node-fetch chain, direct + transitive via @camptocamp/ogc-client)

Prod-only install (npm ci --omit=dev --ignore-scripts) now shows only:

• node-domexception@1.0.0