feat(poly diff): print changes for projects and/or bricks

[DavidVujic]

Description

Add possibility to print changes only for bricks.

Adding the option --bricks.

Combinations

As-is

poetry poly diff

As-is

poetry poly diff --short

New

poetry poly diff --bricks

Short, useful for CI and/or running tests for changed code only

New

poetry poly diff --bricks --short

Motivation and Context

This is useful when running tests for changed bricks only.

Fixes #116

Example usage:

# store the diff in a bash variable
changes=$(poetry poly diff --bricks --short)

# create a pytest query, i.e. "hello or world or something"
query=${changes//,/ or }

# run the test, filtered by keyword expression.
poetry run pytest -k <<< echo $query

# or run the test, filtered by pytest markers
poetry run pytest -m <<< echo $query

How Has This Been Tested?

Local install and tested with the python-polylith-example repo.
CI ✅

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I have read the code of conduct.
• I have read the contributing guide.
• I have updated the documentation accordingly (if applicable).

[sonarqubecloud]

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