Switch to uv - converters/dbt

[MonkeyCanCode]

As per ML, we want to proceed with more standard layout for python project by using uv. Here are the changes made in this PR:

1. Added README.md with instructions around uv
2. Updated pyproject.toml with PEP 639
3. Added authors, readme, keywords, project.urls in pyproject.toml (unlike keywords in python/, this one has an extra entry for dbt)
4. Removed redundant classifiers in pyproject.toml as that is covered by requires-python
5. Added uv.lock

Sample validation:

➜  dbt git:(switch_to_uv_dbt) uv run pytest --snapshot-update

========================================================================== test session starts ===========================================================================
platform darwin -- Python 3.11.13, pytest-9.1.1, pluggy-1.6.0
rootdir: /Users/yong/Desktop/GitHome/ossie/converters/dbt
configfile: pyproject.toml
testpaths: tests
plugins: syrupy-5.5.3
collected 94 items

tests/test_msi_to_osi.py ..................................................................                                                                        [ 70%]
tests/test_osi_to_msi.py ............................                                                                                                              [100%]

------------------------------------------------------------------------ snapshot report summary -------------------------------------------------------------------------
5 snapshots generated.
=========================================================================== 94 passed in 0.35s ===========================================================================

➜  dbt git:(switch_to_uv_dbt) ✗ uv sync
Resolved 31 packages in 3ms
Checked 30 packages in 1ms

➜  dbt git:(switch_to_uv_dbt) ✗ uv run pytest
========================================================================== test session starts ===========================================================================
platform darwin -- Python 3.11.13, pytest-9.1.1, pluggy-1.6.0
rootdir: /Users/yong/Desktop/GitHome/ossie/converters/dbt
configfile: pyproject.toml
testpaths: tests
plugins: syrupy-5.5.3
collected 94 items

tests/test_msi_to_osi.py ..................................................................                                                                        [ 70%]
tests/test_osi_to_msi.py ............................                                                                                                              [100%]

------------------------------------------------------------------------ snapshot report summary -------------------------------------------------------------------------
5 snapshots passed.
=========================================================================== 94 passed in 0.26s ===========================================================================
➜  dbt git:(switch_to_uv_dbt) ✗

[jbonofre]

Can you please remove the LICENSE and NOTICE file for now? The "root" ones are good enough.

[MonkeyCanCode]

Can you please remove the LICENSE and NOTICE file for now? The "root" ones are good enough.

This is completed.

[MonkeyCanCode]

Closed in favor of #228