update project structure

- move agent to /agent
- change /beszel to /src
- update workflows and docker builds

src/site/.prettierrc

@@ -0,0 +1,8 @@
+{
+	"trailingComma": "es5",
+	"useTabs": true,
+	"tabWidth": 2,
+	"semi": false,
+	"singleQuote": false,
+	"printWidth": 120
+}