feat(packaging): Add npm packaging and installer: wrapper, postinstall downloader, publish workflow, and packaging files

.npmignore

@@ -0,0 +1,54 @@
+# Source code (not needed for binary distribution)
+/ts/
+/test/
+mod.ts
+*.ts
+
+# Development files
+.git/
+.gitea/
+.claude/
+.serena/
+.nogit/
+.github/
+deno.json
+deno.lock
+tsconfig.json
+
+# Scripts not needed for npm
+/scripts/compile-all.sh
+install.sh
+uninstall.sh
+example-action.sh
+
+# Documentation files not needed for npm package
+readme.plan.md
+readme.hints.md
+npm-publish-instructions.md
+docs/
+
+# IDE and editor files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Keep only the install-binary.js in scripts/
+/scripts/*
+!/scripts/install-binary.js
+
+# Exclude all dist directory (binaries will be downloaded during install)
+/dist/
+
+# Logs and temporary files
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Other
+node_modules/
+.env
+.env.*