Allow separation of module output into separate views

When running mvnd on a failing build it is really hard to figure out what was going on when the build is highly parallel.

As a solution to this, I would find a way to view only the output of each module separatly very useful.
This could either be separate files, or an interactive tui that allows me to select the module output I want to read.

The issue names no files, tests, or entry points, so begin by locating mvnd's parallel build output handling and command-line interface. Compare the proposed per-module files and interactive TUI approaches, then define how users access one module's output during a failing parallel build. Done means a selected module's output can be viewed separately.

Written by the indexing model from the issue text.