Fix #433: Migrate to UV

[senthurayyappan]

• Modifes all workflow files to use UV instead of poetry
• Edits all makefile commands to use uv instead of poetry
• Removes poetry.lock
• Adds uv.lock
• Updates all instructions to use UV

[unshrawal]

Does OSL not support Python 3.9 anymore? It seems like uv supports Python 3.8+

[senthurayyappan]

This is due to a conflict with the newer flexsea library, which had some dependency issues with py3.9!

(base) holycow@0-0 opensourceleg % uv sync
  × No solution found when resolving dependencies for split (python_full_version == '3.9.*'):
  ╰─▶ Because flexsea<=6.0.5 depends on numpy>=1.19.dev0,<1.20.dev0 and only the following versions of flexsea are available:
          flexsea==5.0.0
          flexsea==5.0.1
          flexsea==5.0.2
          flexsea==5.0.3
          flexsea==5.0.4
          flexsea==5.0.5
          flexsea==5.0.6
          flexsea==5.0.7
          flexsea==6.0.0
          flexsea==6.0.1
          flexsea==6.0.2
          flexsea==6.0.3
          flexsea==6.0.4
          flexsea==6.0.5
          flexsea==10.0.0
          flexsea==10.1.2
          flexsea==10.1.3
          flexsea==10.1.4
          flexsea==10.1.5
          flexsea==10.1.6
          flexsea==10.1.7
          flexsea==10.1.8
          flexsea==10.1.9
          flexsea==10.5.0
          flexsea==10.5.1
          flexsea==10.5.2
          flexsea==10.5.3
          flexsea==11.0.0
          flexsea==11.0.1
          flexsea==11.0.2
          flexsea==11.0.3
          flexsea==11.0.4
          flexsea==11.0.5
          flexsea==11.0.6
          flexsea==11.0.7
          flexsea==11.0.8
          flexsea==11.0.9
          flexsea==12.0.0
          flexsea==12.0.1
          flexsea==12.0.2
          flexsea==12.0.3
          flexsea==12.0.4
      we can conclude that flexsea<10.0.0 depends on numpy>=1.19.dev0,<1.20.dev0. (1)

      Because the requested Python version (>=3.9, <4.0) does not satisfy Python>=3.11,<4.0 and all of:
          flexsea>=10.0.0,<=10.1.3
          flexsea>=11.0.0
      depend on Python>=3.11.0,<4.0.0, we can conclude that all of:
          flexsea>=10.0.0,<=10.1.3
          flexsea>=11.0.0
       cannot be used.
      And because we know from (1) that flexsea<10.0.0 depends on numpy>=1.19.dev0,<1.20.dev0, we can conclude that all of:
          flexsea<10.1.4
          flexsea>10.5.3
      depend on numpy>=1.19.dev0,<1.20.dev0. (2)

      Because the requested Python version (>=3.9, <4.0) does not satisfy Python>=3.10,<4.0 and flexsea>=10.1.4,<=10.5.3 depends on Python>=3.10,<4.0, we can conclude that
      flexsea>=10.1.4,<=10.5.3 cannot be used.
      And because we know from (2) that all of:
          flexsea<10.1.4
          flexsea>10.5.3
      depend on numpy>=1.19.dev0,<1.20.dev0, we can conclude that all versions of flexsea depend on numpy>=1.19.dev0,<1.20.dev0.
      And because opensourceleg[dephy] depends on flexsea, we can conclude that opensourceleg[dephy] depends on numpy>=1.19.dev0,<1.20.dev0.
      And because your project depends on numpy>=1.24.3,<2 and your project requires opensourceleg[dephy], we can conclude that your project's requirements are
      unsatisfiable.

      hint: The `requires-python` value (>=3.9, <4.0) includes Python versions that are not supported by your dependencies (e.g., all of:
          flexsea>=10.0.0,<=10.1.3
          flexsea>=11.0.0
       only supports >=3.11.0, <4.0.0). Consider using a more restrictive `requires-python` value (like >=3.11.0, <4.0.0).
(base) holycow@0-0 opensourceleg % 

And it seems too troublesome to support different versions of Flexsea.