[FEATURE] Create desktop app

[ncrispino]

Feature Description

Create a simple electron(?) app in style of the codex app, claude code apps, etc. Find sone inspiration to base off of.

At its simplest, should let you spin up MassGen sessions then view each agent/subagent as its own panel through a messaging chat interface inspired by discord. And full feature equality with the TUI just displayed much much cleaner and in a more native chat interface.

Config building is built in as well as allowing you to work in git repos.

A couple of refinement settings are available:

1. Multi-agent ensemble (each agent answers once, votes, then final presenter voted on will synthesize)

2. Multi-agent full massgen

3. Single agent massgen for refinement

4. Single agent massgen + evaluator paradigm