feat: automate config.json copying and update dependencies

- Added a script (copy_config.js) to copy config.json from the root directory to the frontend's public directory before starting the development server, building, or starting the application.
- Updated package.json scripts to include the config copying step.
- Updated dependencies in package.json, including adding web3 and ensuring tailwindcss is included in devDependencies.
- Modified tsconfig.json to include a path for the config file.
- Added a new config.json file in the public directory with API_URL, CONTRACT_ADDRESS, and ABI details for the smart contract.

crypto_clash_frontend/copy_config.js

@@ -0,0 +1,9 @@
+
+// Copy config.json from root to frontend directory
+import fs from "fs";
+import path from "path";
+const sourcePath = path.join("../config.json");
+const destPath = path.join("./public/config.json");
+
+fs.copyFileSync(sourcePath, destPath);
+console.log("✓ config.json copied to frontend public directory");