add -dry-run option to aliases example

[MAHESHKANDELA]

Summary
• Added a --dry-run flag to the alias command in examples/aliases/aliases.py to preview alias changes without writing the config file.
• Changed config writing to text mode with UTF-8 encoding for correct configparser behavior.

Behavior
• alias ALIAS CMD --config_file writes the alias mapping and prints confirmation.
• alias ALIAS CMD --config_file --dry-run prints what would change and exits without modifying the file.

Tests
• Added tests/test_examples_aliases.py covering write, dry-run no-write, and overwrite behavior.
• python -m pytest -q → 1322 passed, 22 skipped, 1 xfailed

Commits
• 17b8b5f Add dry-run option to aliases example
• 3b9eb0f Add tests for aliases dry-run behavior

[MAHESHKANDELA]

Hi, thanks for taking a look at this PR.
I noticed it was closed — if there’s any specific feedback or reason it wasn’t aligned with the project direction, I’d really appreciate understanding so I can improve future contributions.

Thanks again!

[davidism]

Stop using LLMs to generate output at us.