[RHartung-ND]

Proposed Changes

Updates to the TaskVine "hello world" example as per pr (#4562).

Updates to (quickstart.py)

• Estimates pi with Monte Carlo sampling split across 16 PythonTasks
• Uses port=0 and a per-user project name (taskvine-pi-<username>).
• Creates the Manager and a local Factory with with blocks, so workers and the manager are cleaned up automatically.
• Includes comments for new users (why imports go inside remote functions, what wait() returning None means, and what task.output holds).

New "Build on the Quick Start" section:

• Unix command tasks (Task with an input buffer)
• Python function tasks (PythonTask)
• Basic resource requests (set_cores, set_memory)
• Shared local file and URL inputs with cache="workflow"
• Connecting two tasks through a temporary file (declare_temp)

Merge Checklist

• make test Run local tests prior to pushing.
• make format Format source code to comply with lint policies. Note that some lint errors can only be resolved manually (e.g., Python)
• make lint Run lint on source code prior to pushing.
• Manual Update: Update the manual to reflect user-visible changes.
• Type Labels: Select a github label for the type: bugfix, enhancement, etc.
• Product Labels: Select a github label for the product: TaskVine, Makeflow, etc.
• PR RTM: Mark your PR as ready to merge.

[dthain]

Make a new PR against the taskvine-manual-restructure branch, please.