feat(ai-sdk)!: remove relocated Rudder bindings (/server, make:agent, ai:eval) + drop @rudderjs/* peers

[suleimansh]

Final step of epic #35 (decouple @gemstack/ai-sdk from @rudderjs/*).

The /server provider, make:agent scaffolder, and ai:eval CLI command were already relocated to the Rudder side and now ship in published @rudderjs/ai@1.18.4. This PR deletes them from the engine and drops the associated optional peers, so the framework-agnostic engine no longer carries any @rudderjs/* peer dependency for these paths.

Removed

• src/server/ (the /server provider) and the ./server export
• src/commands/ (make-agent, ai-eval) and the ./commands/make-agent + ./commands/ai-eval exports
• The CLI tests src/eval-cli.test.ts and src/eval-html.test.ts (imported the removed ai-eval CLI)
• @rudderjs/core and @rudderjs/console from peerDependencies, peerDependenciesMeta, and devDependencies
• The AiProvider test region in src/index.test.ts

Also

• Trimmed src/isomorphic-check.test.ts (no more /server exemption / existence assertion)
• Rephrased illustrative @rudderjs/* references in non-test source doc-comments to framework-neutral wording (ai-sdk decouple: cleanup doc-comment refs + drop @rudderjs/* peers from package.json #41)
• Updated the README Status section + subpath table
• Added a changeset (minor bump on 0.x)

Verification

• pnpm --filter @gemstack/ai-sdk build passes (no type errors)
• Test suite green: 900 pass, 0 fail
• grep -rn '@rudderjs' packages/ai-sdk/src (excluding queue-job.ts and *.test.ts) returns nothing

Breaking change

The ./server, ./commands/make-agent, and ./commands/ai-eval subpaths and the @rudderjs/core / @rudderjs/console peers are removed. Rudder users pick them up unchanged from @rudderjs/ai. Versioned as a minor bump while the package is on 0.x.

Note

src/queue-job.ts still dynamically imports @rudderjs/queue / @rudderjs/broadcast (a separate BYO feature seam) and is intentionally left untouched here; it will be handled by a follow-up issue. So the epic's literal grep -rn @rudderjs src is not fully empty yet.

Closes #39
Closes #40
Closes #41