feat: add configuration files and scripts for project setup ✨

🚀 Breaking Changes:
- Introduced new environment variables for GitLab API integration
- Added validation script for PR checks
- Updated package.json with new scripts for testing and formatting

📝 Details:
- Added .prettierrc and .eslintrc.json for code formatting and linting
- Created .env.example for environment variable setup
- Updated CHANGELOG.md with recent changes
- Added documentation for GitHub secrets setup

test/validate-api.js

@@ -0,0 +1,96 @@
+#!/usr/bin/env node
+
+// Simple API validation script for PR testing
+import fetch from "node-fetch";
+
+const GITLAB_API_URL = process.env.GITLAB_API_URL || "https://gitlab.com";
+const GITLAB_TOKEN = process.env.GITLAB_TOKEN_TEST || process.env.GITLAB_TOKEN;
+const TEST_PROJECT_ID = process.env.TEST_PROJECT_ID;
+
+async function validateGitLabAPI() {
+  console.log("🔍 Validating GitLab API connection...\n");
+
+  if (!GITLAB_TOKEN) {
+    console.warn("⚠️  No GitLab token provided. Skipping API validation.");
+    console.log("Set GITLAB_TOKEN_TEST or GITLAB_TOKEN to enable API validation.\n");
+    return true;
+  }
+
+  if (!TEST_PROJECT_ID) {
+    console.warn("⚠️  No test project ID provided. Skipping API validation.");
+    console.log("Set TEST_PROJECT_ID to enable API validation.\n");
+    return true;
+  }
+
+  const tests = [
+    {
+      name: "Fetch project info",
+      url: `${GITLAB_API_URL}/api/v4/projects/${encodeURIComponent(TEST_PROJECT_ID)}`,
+      validate: data => data.id && data.name,
+    },
+    {
+      name: "List issues",
+      url: `${GITLAB_API_URL}/api/v4/projects/${encodeURIComponent(TEST_PROJECT_ID)}/issues?per_page=1`,
+      validate: data => Array.isArray(data),
+    },
+    {
+      name: "List merge requests",
+      url: `${GITLAB_API_URL}/api/v4/projects/${encodeURIComponent(TEST_PROJECT_ID)}/merge_requests?per_page=1`,
+      validate: data => Array.isArray(data),
+    },
+    {
+      name: "List branches",
+      url: `${GITLAB_API_URL}/api/v4/projects/${encodeURIComponent(TEST_PROJECT_ID)}/repository/branches?per_page=1`,
+      validate: data => Array.isArray(data),
+    },
+  ];
+
+  let allPassed = true;
+
+  for (const test of tests) {
+    try {
+      console.log(`Testing: ${test.name}`);
+      const response = await fetch(test.url, {
+        headers: {
+          Authorization: `Bearer ${GITLAB_TOKEN}`,
+          Accept: "application/json",
+        },
+      });
+
+      if (!response.ok) {
+        throw new Error(`HTTP ${response.status}: ${response.statusText}`);
+      }
+
+      const data = await response.json();
+
+      if (test.validate(data)) {
+        console.log(`✅ ${test.name} - PASSED\n`);
+      } else {
+        console.log(`❌ ${test.name} - FAILED (invalid response format)\n`);
+        allPassed = false;
+      }
+    } catch (error) {
+      console.log(`❌ ${test.name} - FAILED`);
+      console.log(`   Error: ${error.message}\n`);
+      allPassed = false;
+    }
+  }
+
+  if (allPassed) {
+    console.log("✅ All API validation tests passed!");
+  } else {
+    console.log("❌ Some API validation tests failed!");
+  }
+
+  return allPassed;
+}
+
+// Run validation
+validateGitLabAPI()
+  .then(success => process.exit(success ? 0 : 1))
+  .catch(error => {
+    console.error("Unexpected error:", error);
+    process.exit(1);
+  });
+
+export { validateGitLabAPI };