feat: add shared Rust MSIX engine and CLI

Closes #2

.gitignore

@@ -6,6 +6,9 @@
 *.pfx
 *.p12
 *.key
+*.isproj.local.json
+*.isproj.bak
+*.isproj.local.json.bak
 
 # Build dependencies and temporary files
 node_modules/
@@ -15,3 +18,8 @@ __pycache__/
 *.log
 .DS_Store
 Thumbs.db
+
+# Local sample payloads, build workspaces and generated MSIX packages
+/output/samples/
+
+.mcp.json