feat(pulumi): @mcpctl/pulumi — generic Pulumi provider for mcpctl

New workspace package: a Pulumi dynamic provider (TypeScript, in-process) that
manages mcpctl resources declaratively from any Pulumi program. Motivated by
model drift: when the deployed vLLM/LiteLLM model changes, mcpctl's llm target
must follow, and a Pulumi resource makes that automatic on `pulumi up`.

- Generic core `McpctlResource({ kind, name, spec, mcpd })` round-trips ANY
  mcpctl resource kind; typed `Llm` wrapper for ergonomics.
- Engine talks direct HTTP to mcpd's REST API (ported from cli/api-client.ts),
  mirroring apply's name-keyed upsert (PUT strips immutable name/type) and
  get -o json's read field-stripping. No mcpctl binary needed → CI-friendly.
- CRUD/diff/check with correct replace semantics (name/type/kind/mcpd.url force
  delete-before-replace), 429 retry, secret token in state.
- Validation deferred to mcpd's Zod schemas, so new resource kinds work with no
  provider release.
- CommonJS build so the serialized dynamic provider's module refs are captured.
- 18 Vitest tests (mocked mcpd + Pulumi mocks); build + lint clean; README with
  auth (PAT) setup and consumer example for kubernetes-deployment.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/pulumi/tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "rootDir": "src",
+    "outDir": "dist",
+    "types": ["node"],
+    "exactOptionalPropertyTypes": false,
+    "module": "CommonJS",
+    "moduleResolution": "Node"
+  },
+  "include": ["src/**/*.ts"]
+}