update gdsfactory 8.21.0

[joamatab]

Summary by Sourcery

Update the gdsfactory dependency to version 8.21.0 and refactor code to consistently use 'gf.Component' as the return type for component functions. Enhance test coverage by adding new test configurations for the 'compass' component and updating existing tests for the 'rectangle' component to include layer information.

Enhancements:

• Update function return types to use 'gf.Component' instead of 'Component' for consistency and clarity across multiple files.

Build:

• Upgrade gdsfactory dependency from version 8.20.0 to 8.21.0 in the pyproject.toml file.

Tests:

• Add new test configurations for the 'compass' component across different technology nodes, including si220, si500, and sin300.
• Update test configurations for the 'rectangle' component to include layer information in the name across different technology nodes.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR updates the gdsfactory dependency to version 8.21.0 and makes corresponding type annotation changes. It also adds a new compass component and modifies the rectangle component to accept an explicit layer parameter.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Updated return type annotations from Component to gf.Component	Changed return type annotations in all component functions Updated type hints to be more explicit and consistent	cspdk/si220/cells/primitives.py cspdk/si500/cells.py cspdk/sin300/cells.py
Added new compass component for creating rectangles with ports on each edge	Added compass function with configurable size, layer, and port settings Implemented port orientation and type configuration Added corresponding test files for the new component	cspdk/si220/cells/primitives.py cspdk/si500/cells.py cspdk/sin300/cells.py tests/test_si220/test_settings_compass_.yml tests/test_si500/test_settings_compass_.yml tests/test_sin300/test_settings_compass_.yml
Modified rectangle component to accept explicit layer parameter	Changed rectangle function signature to take layer as a named parameter Updated default layer to FLOORPLAN Updated corresponding test files with new component naming	cspdk/si220/cells/primitives.py cspdk/si500/cells.py cspdk/sin300/cells.py tests/test_si220/test_settings_rectangle_.yml tests/test_si500/test_settings_rectangle_.yml tests/test_sin300/test_settings_rectangle_.yml
Updated gdsfactory dependency version	Bumped gdsfactory version from 8.20.0 to 8.21.0	pyproject.toml

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