Feat docs (#1814)

* improve docs and formatting

* lint in ci

avoid using bundled prettier from vscode extension

* fix action, typos

* remove header

* remove unused deps

docs/.prettierrc.json

@@ -0,0 +1,5 @@
+{
+    "tabWidth": 4,
+    "semi": true,
+    "singleQuote": true
+}