Add initial Neptune Frontend setup

Initial setup of the Neptune frontend project, including Dockerfile, environment files, TypeScript configuration, and essential components. Added basic page structures for dashboard and wallet, and configured Tailwind CSS and postcss.

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml