feat: sync all 140 Microsoft skills with collision protection

- Add find_github_skills() to discover skills in .github/skills/ not
  reachable via the skills/ symlink tree (picks up 11 missing skills)
- Add collision protection: if a target directory exists and was not
  from a previous Microsoft sync, append -ms suffix instead of overwriting
- Microsoft mcp-builder → mcp-builder-ms (community version preserved)
- Microsoft skill-creator → skill-creator-ms (community version preserved)
- Total skills: 856 (was 845, +11 newly discovered)

data/bundles.json

@@ -20,6 +20,7 @@
         "async-python-patterns",
         "autonomous-agents",
         "aws-serverless",
+        "azure-ai-agents-persistent-java",
         "azure-ai-anomalydetector-java",
         "azure-ai-contentsafety-java",
         "azure-ai-contentsafety-py",
@@ -117,6 +118,7 @@
         "claude-d3js-skill",
         "code-documentation-doc-generate",
         "context7-auto-research",
+        "copilot-sdk",
         "discord-bot-architect",
         "django-pro",
         "documentation-generation-doc-generate",
@@ -126,6 +128,7 @@
         "dotnet-backend-patterns",
         "exa-search",
         "fastapi-pro",
+        "fastapi-router-py",
         "fastapi-templates",
         "firebase",
         "firecrawl-scraper",
@@ -161,6 +164,7 @@
         "m365-agents-ts",
         "makepad-skills",
         "mcp-builder",
+        "mcp-builder-ms",
         "memory-safety-patterns",
         "mobile-design",
         "mobile-developer",
@@ -179,7 +183,9 @@
         "openapi-spec-generation",
         "php-pro",
         "plaid-fintech",
+        "podcast-generation",
         "product-manager-toolkit",
+        "pydantic-models-py",
         "python-development-python-scaffold",
         "python-packaging",
         "python-patterns",
@@ -339,6 +345,7 @@
     "k8s-core": {
       "description": "Kubernetes and service mesh essentials.",
       "skills": [
+        "azd-deployment",
         "azure-cosmos-db-py",
         "azure-identity-dotnet",
         "azure-identity-java",
@@ -456,6 +463,7 @@
         "postgresql",
         "prisma-expert",
         "programmatic-seo",
+        "pydantic-models-py",
         "quant-analyst",
         "react-best-practices",
         "react-ui-patterns",
@@ -486,6 +494,7 @@
         "api-testing-observability-api-mock",
         "application-performance-performance-optimization",
         "aws-serverless",
+        "azd-deployment",
         "azure-ai-anomalydetector-java",
         "azure-mgmt-applicationinsights-dotnet",
         "azure-mgmt-arizeaiobservabilityeval-dotnet",