Add main script and README for CloudSQL to Supabase migration tool

Author: Domains18

READM.md

@@ -0,0 +1,17 @@
+# ================================
+# README.md
+# CloudSQL to Supabase Migration Tool
+
+A CLI tool to migrate PostgreSQL databases from Google Cloud SQL to Supabase.
+
+## Usage
+```bash
+python main.py migrate
+python main.py backup
+```
+
+## Setup
+```bash
+pip install -r requirements.txt
+cp .env.example .env
+```

main.py

@@ -0,0 +1,3 @@
+from cloudsql_to_supabase.cli import cli
+if __name__ == "__main__":
+    cli()