Add autopilot-aware pre-commit warnings + post-commit driver reminder

- Pre-commit hook: warns when autopilot is enabled and non-terminal tasks exist
- Post-commit hook: after commit, prints non-terminal task summary if autopilot on
- Post-commit exits 0 always (informational only, never blocks)
- Both hooks read .agent.md to detect Autopilot: Enabled

tasks/add-post-commit-autopilot-driver/IMPLEMENTATION.md

@@ -0,0 +1,11 @@
+# Implementation: Post-Commit Autopilot Reminder
+
+## Changes
+- Created `scripts/git-hooks/post-commit`
+- Reads `.agent.md` for autopilot mode
+- Scans non-terminal tasks via `status.py --list`
+- Prints summary with count and command to run orchestrator
+- Always exits 0 (informational only)
+
+## Files Created
+- `scripts/git-hooks/post-commit`: ~45 lines