refactor: reorganize task management imports and update task handling tools

- Updated import paths for task management providers in task-comment, task-create, and task-update tools.
- Removed deprecated task-complete and task-pickup tools, replacing them with work-finish and work-start tools for improved task handling.
- Enhanced work-finish and work-start tools to streamline task completion and pickup processes, including context-aware detection and auto-scheduling features.
- Updated package.json to include build scripts and main entry point.
- Modified tsconfig.json to enable output directory, declaration files, and source maps for better TypeScript support.

lib/providers/index.ts

@@ -0,0 +1,36 @@
+/**
+ * Provider factory — auto-detects GitHub vs GitLab from git remote.
+ */
+import { execFileSync } from "node:child_process";
+import type { IssueProvider } from "./provider.js";
+import { GitLabProvider } from "./gitlab.js";
+import { GitHubProvider } from "./github.js";
+import { resolveRepoPath } from "../projects.js";
+
+export type ProviderOptions = {
+  provider?: "gitlab" | "github";
+  repo?: string;
+  repoPath?: string;
+};
+
+export type ProviderWithType = {
+  provider: IssueProvider;
+  type: "github" | "gitlab";
+};
+
+function detectProvider(repoPath: string): "gitlab" | "github" {
+  try {
+    const url = execFileSync("git", ["remote", "get-url", "origin"], { cwd: repoPath, timeout: 5_000 }).toString().trim();
+    return url.includes("github.com") ? "github" : "gitlab";
+  } catch {
+    return "gitlab";
+  }
+}
+
+export function createProvider(opts: ProviderOptions): ProviderWithType {
+  const repoPath = opts.repoPath ?? (opts.repo ? resolveRepoPath(opts.repo) : null);
+  if (!repoPath) throw new Error("Either repoPath or repo must be provided");
+  const type = opts.provider ?? detectProvider(repoPath);
+  const provider = type === "github" ? new GitHubProvider({ repoPath }) : new GitLabProvider({ repoPath });
+  return { provider, type };
+}