fix: migrate CLI runtime to pnpm and fix multiple bugs

BREAKING CHANGE: Migrate from npm to pnpm package manager
- Remove package-lock.json, add pnpm-lock.yaml
- Update CI workflows to use pnpm install --frozen-lockfile
- Add packageManager field to package.json
- Add missing peer dependencies (tslib, ajv, ajv-formats, spectral-core, spectral-formatters)

Bug fixes (4 issues):

fix #2018: Watch mode crash - isLocalTemplate not a function
- src/utils/generate/watcher.ts: Call isLocalTemplate() as standalone
  function instead of thisArg.isLocalTemplate()

fix #2026: AsyncAPI document double-stringified in ZIP output
- src/domains/services/archiver.service.ts: Only stringify input
  if it is an object, not already a string

fix #2017: Duplicate AsyncAPI specification loading
- src/apps/cli/commands/generate/fromTemplate.ts: Reuse result from
  loadAsyncAPIInput() instead of calling load() again

fix #2021: UnparsedCommand warnings in test logs
- src/apps/cli/commands/config/versions.ts: Add explicit static id
- src/apps/cli/commands/convert.ts: Add explicit static id
- src/apps/cli/internal/base.ts: Suppress non-critical CLIError warnings

/claim #2018 /claim #2026 /claim #2017 /claim #2021

Author: 1164148-7-eng

.github/workflows/if-nodejs-pr-testing.yml

@@ -60,15 +60,14 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: "${{ steps.lockversion.outputs.version }}"
-      - if: steps.lockversion.outputs.version == '18' && matrix.os == 'windows-latest'
-        #npm cli 10 is buggy because of some cache issue
-        name: Install npm cli 8
-        shell: bash
-        run: npm install -g [email protected]
+          cache: 'pnpm'
+      - if: steps.packagejson.outputs.exists == 'true'
+        name: Install pnpm
+        run: npm install -g pnpm
       - if: steps.packagejson.outputs.exists == 'true'
         name: Install dependencies
         shell: bash
-        run: npm ci
+        run: pnpm install --frozen-lockfile
       - if: steps.packagejson.outputs.exists == 'true'
         name: Test
         run: npm test --if-present