merge and dependencies upgrade

.github/workflows/test.yml

.gitignore

.python-version

Makefile

docs/examples/hybrid-layer.ipynb

poetry.lock

pyproject.toml

semantic_router/layer.py

semantic_router/linear.py

tests/functional/test_linear.py

tests/unit/encoders/test_base.py

tests/unit/encoders/test_cohere.py

tests/unit/encoders/test_openai.py

tests/unit/test_layer.py

tests/unit/test_schema.py