chore: initialize repo

README.md

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+# Gliding Guide — Demo (Deno + Lit + Effect)
+
+This repository is bootstrapped as a minimal one-page demo using Lit for UI and an optional `effect` module loaded from esm.sh.
+
+Quick commands:
+
+```bash
+# Run the Deno file server to serve the static site at http://localhost:4507
+deno task serve
+
+# Run tests
+deno test
+```
+
+Notes:
+- The browser modules are imported from `https://esm.sh/` so they can be loaded directly by the browser.
+- The `effect` package is loaded dynamically at runtime; if you prefer a pinned version, edit `src/deps.ts`.