Add process tree viewer with Safari tab enrichment

[horner]

Why

• Often when looking at a process I want to kill I don't know who ran it.
• It's nice to quickly inspect the process tree to see who launched the process.

Features

• Right-click or click lock then tree icon to view process hierarchy
• Shows ancestor chain, children, grandchildren with CPU% and memory
• Displays Chrome/Electron process types (renderer, gpu, utility)
• Lists open Safari tabs with domains when viewing Safari processes
• Runs ps and AppleScript asynchronously to avoid UI blocking

StatsProcessInspector_compressed.mp4

Example capture:

Example capture of Safari:

[horner]

@exelban thanks for making stats open source!

[exelban]

hi, few problems I see with that:

• it should work across all modules in the same way, right now this PR do that only for CPU. It provides a big inconsistency between modules
• no Apple Script should be used since, only API since API it's much more easier to catch if it's deprecated or changed