chore(dependencies): update telegram-sticker-utils

chore(dependencies): update telegram-sticker-utils

🔧 chore(dependencies): bump `telegram-sticker-utils` to v0.2.18

Updated the `telegram-sticker-utils` dependency to v0.2.18 for
improved compatibility and performance.

Also, upgraded project version to 0.1.21.

✨ feat(cli): update snapshot limit and enhance error handling

- Change snapshot limit to use SNAPSHOT_MAX_COUNT from const
- Improve error messages and return types in push_to_cloud function
- Add SNAPSHOT_MAX_COUNT constant in const.py to manage snapshots

🔖 chore(pyproject.toml): bump version to 0.1.17 and update dependency

🔖 chore(pyproject.toml): bump version to 0.1.17 and update dependency

🔖 fix: bump version to 0.1.16 in pyproject.toml

🚀 refactor(cli): update index creation and validation messages

- Removed redundant initialization messages
- Improved feedback for index creation
- Added warning for long owner IDs
- Enhanced error message for bot account usage

🔧 refactor(cli): remove download-dir option and update logic for stic…

…ker downloads

📚 docs(README): update usage instructions and command descriptions

🔖 chore(pyproject): bump version and dependencies

🔧 chore(deps): update telegram-sticker-utils to v0.2.14