Use Deno for speed, package locks in dev setup, github workflows

It's faster than yarn and comes with standard convenience utilities

src/interface/web/deno.json

@@ -0,0 +1,10 @@
+{
+    "tasks": {
+        "hook": "deno run --allow-read --allow-run --allow-write https://deno.land/x/deno_hooks@0.1.1/mod.ts"
+    },
+    "fmt": {
+        "indentWidth": 4,
+        "lineWidth": 100,
+        "proseWrap": "preserve"
+    }
+}

src/interface/web/package.json

@@ -6,7 +6,7 @@
         "dev": "next dev",
         "build": "next build",
         "start": "next start",
-        "lint": "next lint",
+        "lint": "deno fmt",
         "collectstatic": "bash -c 'pushd ../../../ && source .venv/bin/activate && python3 src/khoj/manage.py collectstatic --noinput && deactivate && popd'",
         "cicollectstatic": "bash -c 'pushd ../../../ && python3 src/khoj/manage.py collectstatic --noinput && popd'",
         "export": "yarn build && cp -r out/ ../../khoj/interface/built && yarn collectstatic",