refactor(docs): move source for doc pages here (#119)

* docs: move dev docs to dev-docs folder

* docs: move source for doc pages here

* docs: improve docs

docs/next.config.js

@@ -0,0 +1,11 @@
+const withNextra = require("nextra")({
+  theme: "nextra-theme-docs",
+  themeConfig: "./theme.config.jsx",
+});
+
+module.exports = withNextra({
+  output: "standalone",
+});
+
+// If you have other Next.js configurations, you can pass them as the parameter:
+// module.exports = withNextra({ /* other next.js config */ })