fix: Add missing CreatePullRequestSchema and createPullRequest function

Author: jspahrsummers

src/github/operations/pulls.ts

@@ -76,6 +76,17 @@ export const PullRequestReviewSchema = z.object({
 });
 
 // Input schemas
+export const CreatePullRequestSchema = z.object({
+  owner: z.string().describe("Repository owner (username or organization)"),
+  repo: z.string().describe("Repository name"),
+  title: z.string().describe("Pull request title"),
+  body: z.string().optional().describe("Pull request body/description"),
+  head: z.string().describe("The name of the branch where your changes are implemented"),
+  base: z.string().describe("The name of the branch you want the changes pulled into"),
+  draft: z.boolean().optional().describe("Whether to create the pull request as a draft"),
+  maintainer_can_modify: z.boolean().optional().describe("Whether maintainers can modify the pull request")
+});
+
 export const GetPullRequestSchema = z.object({
   owner: z.string().describe("Repository owner (username or organization)"),
   repo: z.string().describe("Repository name"),
@@ -149,6 +160,22 @@ export const GetPullRequestReviewsSchema = z.object({
 });
 
 // Function implementations
+export async function createPullRequest(
+  params: z.infer<typeof CreatePullRequestSchema>
+): Promise<z.infer<typeof GitHubPullRequestSchema>> {
+  const { owner, repo, ...options } = CreatePullRequestSchema.parse(params);
+
+  const response = await githubRequest(
+    `https://api.github.com/repos/${owner}/${repo}/pulls`,
+    {
+      method: "POST",
+      body: options,
+    }
+  );
+
+  return GitHubPullRequestSchema.parse(response);
+}
+
 export async function getPullRequest(
   owner: string,
   repo: string,