Laktory

Added
* Support for Terraform `moved` option (resource rename)
Fixed
* Model variables not carried overs to all environments

Updated
* Reduced import time
* Optimized tests to load spark only when required
* Optimized performance during stack export in IaC backend native format

Added
* `MemoryDataSource` support for reading dict or list of data [[337](https://github.com/okube-ai/laktory/issues/337)]
* Support for `!use` tag in YAML files to directly inject content of other file
* Support for `!update` tag in YAML files to use another file to update the content of a dictionary
* Support for `!extend` tag in YAML files to use another file to extend (append) more items to a list
Updated
* Laktory variables to support python expressions [[334](https://github.com/okube-ai/laktory/issues/334)]
* Laktory variables to support complex types such as dictionaries and lists
* All Laktory model fields to allow `str` type for receiving a variable or expression
* Reference to external YAML file path can use variables injection[[335](https://github.com/okube-ai/laktory/issues/335)]
Breaking Change
* Removed support for ${include.*} variables in YAML files.
* Reference to external YAML files is now relative to the calling file instead of being relative to the stack entry point.

Added
* Support for Python 3.12
* Support for Python 3.13
* Contribution guidelines
* Support for external PR
Updated
* `uv` as the recommended package manager
* Formatting and linting with ruff (instead of black)
* Added ruff formatting and linting as a pre-commit
* Added pytest fixtures to run tests only when required environment variables are available

Fixed
* Injection of variables into pipeline requirements

Fixed
* Serverless pipeline job raises a validation error