Rewrite makefile into poethepoet tasks

[crossjam]

Add PoeThePoet as a dependency to the project using uv.

Read and analyze the Makefile.

Create a plans subdirectory.

Generate a plan to convert the tasks in the Makefile. Wret the plan, in markdown format, to a file in the plans subdirectory. Make sure you include a timestamp and task checklist in the plan.

Execute the plan.