chore: fast follow up on nits from monorepo pr

[SilanHe]

Issue #, if available:

Description of changes:

1. .gitignore — Changed /build/ → **/build/ and /.zip → **/*.zip so patterns correctly match nested paths like packages//build/.
2. map_test.py — Moved assert parent_call[1]["value"] is result from the finally: clause into the try block (before importlib.reload), matching the pattern in parallel_test.py.
3. README.md
   — Added a note that v0.1.0 reserves the package name, moved unimplemented features to a "Planned Features (v0.2.0)" section, and replaced the non-existent instrument_durable_execution quick start with a simple version import.
4. ci-checks.sh — Changed shebang from #!/bin/sh to #!/usr/bin/env bash since the script uses bash array syntax.

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