Added documentation

docs/index.d.ts

@@ -0,0 +1,10 @@
+declare module '*.module.scss' {
+    const classes: { readonly [key: string]: string };
+    export default classes;
+  }
+  
+  declare module '@theme/*';
+  
+  declare module '@components/*';
+  
+  declare module '@docusaurus/*';