feat: support export and import formats for Semantic Model and SJD

[ohadedry]

This pull request adds support for exporting and importing Semantic Models and Spark Job Definitions in multiple formats, in addition to existing support for Notebooks. The changes update the CLI, documentation, and tests to handle new formats (TMDL, TMSL for Semantic Models and SparkJobDefinitionV1, SparkJobDefinitionV2 for Spark Job Definitions), and improve error handling and user feedback for unsupported formats.

Export/Import format support:

• Added support for exporting and importing Semantic Models (TMDL, TMSL) and Spark Job Definitions (SparkJobDefinitionV1, SparkJobDefinitionV2) via the CLI, alongside Notebooks. This includes updating the definition_format_mapping and payload generation logic to handle these new formats. [1] [2] [3] [4] [5]
• Improved error messages and validation when an invalid or unsupported format is specified during import, ensuring users receive clear feedback.

Documentation updates:

• Updated CLI documentation (export.md, import.md, item_examples.md) to reflect the new supported formats for export and import commands. [1] [2] [3]

Testing improvements:

• Extended test parameterization to cover new formats for Semantic Models and Spark Job Definitions, and adjusted invalid format tests to include these types. [1] [2]

Miscellaneous:

• Added a changelog entry documenting the new feature.