feat: added support to watch snapshot while loading file

[petruki]

This pull request introduces support for watching snapshot files for changes when loading them, updates documentation to reflect the new snapshot loading options, and makes minor configuration and workflow updates. The main focus is on enhancing the snapshot loading functionality to allow real-time updates when the snapshot file changes.

Enhancements to snapshot loading and watching:

• Added support for watching the snapshot file for changes when calling Client.load_snapshot with the watch_snapshot option, triggering automatic updates when the file changes (switcher_client/client.py, LoadSnapshotOptions).
• Updated the documentation in README.md to explain the new options for loading snapshots, including how to use the fetch_remote and watch_snapshot parameters.
• Added a new test case to verify that using Client.load_snapshot(LoadSnapshotOptions(watch_snapshot=True)) properly watches the snapshot file and updates the client when the file changes (tests/test_client_watch_snapshot.py).
• Imported LoadSnapshotOptions in the test file to support the new test case (tests/test_client_watch_snapshot.py).

Configuration and workflow updates:

• Updated SonarCloud scan action to version 8.0.0 in both master.yml and sonar.yml workflow files for improved CI/CD integration. [1] [2]
• Set relative_files = True in .coveragerc to improve coverage reporting.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud