add tasks for installing Claude and GitHub Copilot

tasks.py

@@ -0,0 +1,13 @@
+from invoke import task
+
+
+@task
+def install_claude(c):
+    """Install Claude Code via the official install script."""
+    c.run("curl -fsSL https://claude.ai/install.sh | bash", pty=True)
+
+@task
+def install_copilot(c):
+    """Install GitHub Copilot via the official install script."""
+    c.run("curl -fsSL https://gh.io/copilot-install | bash", pty=True)
+