feat: add support for GitHub pull request context in GitHub Actions integration

package.json

@@ -27,6 +27,7 @@
   "license": "MIT",
   "dependencies": {
     "@actions/core": "^3.0.0",
+    "@actions/github": "^9.0.0",
     "@actions/glob": "^0.6.1",
     "axios": "^1.6.7",
     "form-data": "^4.0.0"

src/__mocks__/@actions/github.ts

@@ -0,0 +1,69 @@
+// Manual mock for @actions/github
+
+// Default mock context values - can be overridden in tests
+let mockContext = {
+  payload: {} as Record<string, unknown>,
+  eventName: 'push',
+  sha: '',
+  ref: '',
+  workflow: '',
+  action: '',
+  actor: '',
+  job: '',
+  runAttempt: 1,
+  runNumber: 0,
+  runId: 0,
+  apiUrl: 'https://api.github.com',
+  serverUrl: 'https://github.com',
+  graphqlUrl: 'https://api.github.com/graphql',
+  repo: {
+    owner: '',
+    repo: '',
+  },
+  issue: {
+    owner: '',
+    repo: '',
+    number: 0,
+  },
+};
+
+export const context = mockContext;
+
+// Helper to reset context to defaults
+export function resetContext(): void {
+  mockContext = {
+    payload: {},
+    eventName: 'push',
+    sha: '',
+    ref: '',
+    workflow: '',
+    action: '',
+    actor: '',
+    job: '',
+    runAttempt: 1,
+    runNumber: 0,
+    runId: 0,
+    apiUrl: 'https://api.github.com',
+    serverUrl: 'https://github.com',
+    graphqlUrl: 'https://api.github.com/graphql',
+    repo: {
+      owner: '',
+      repo: '',
+    },
+    issue: {
+      owner: '',
+      repo: '',
+      number: 0,
+    },
+  };
+  // Update the exported context reference
+  Object.assign(context, mockContext);
+}
+
+// Helper to set context values in tests
+export function setContext(overrides: Partial<typeof mockContext>): void {
+  Object.assign(context, overrides);
+}
+
+// Mock getOctokit function
+export const getOctokit = jest.fn();