Add wrangler files

https://developers.cloudflare.com/workers/wrangler/

- wrangler deploy
- wrangler dev

.gitignore

@@ -1 +1,4 @@
 node_modules/
+# wrangler project
+.dev.vars
+.wrangler/

wrangler.toml

@@ -0,0 +1,10 @@
+name = "copilot"
+main = "src/worker.mjs"
+compatibility_date = "2024-01-17"
+no_bundle = true
+
+# Bind a KV Namespace. Use KV as persistent storage for small key-value pairs.
+# Docs: https://developers.cloudflare.com/workers/runtime-apis/kv
+# [[kv_namespaces]]
+# binding = "MY_KV_NAMESPACE"
+# id = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"