fireclass-js v2.0.9

@dharayush7/fireclass-js v2.0.9 aligns the npm package page with
the complete Node.js and Express documentation on the Fireclass website.

What changed

Added the Fireclass logo and package navigation without shield badges.
Added complete Firebase Admin credential and initialization guidance.
Documented app-bound Fireclass setup, validated models, CRUD, typed queries,
AdminAdapter capabilities, and direct SDK import ownership.
Added exact Express middleware options and JSON error responses.
Expanded the migration path from deprecated
@dharayush7/fireclass.
Expanded npm keywords for Node.js, Express, Firebase Admin, Firestore ODM,
typed CRUD, queries, serverless runtimes, and error middleware.
Added changelog and release notes to the published package contents.

No runtime API or behavior changed. The package remains compatible with
@dharayush7/fireclass-core ^2.0.8.

npm run typecheck
npm test
npm run build
npm pack --dry-run