Add statistics module

[Furash]

Implement the Statistics System to track user behavior (operators called, properties changed, and chords used) to identify workflow patterns.

• User should explicitly enable it.
• The stats are dumped every ~3 minutes into s JSON database, which location user should specify.
• Should output a nice table report with an option to add missing chords for frequently used operators (use the chord conversion mechanism)

[Furash]

Closed until the Info panel gets some improvements. The statistics implementation is messy and unreliable so far.

[Furash]

https://projects.blender.org/blender/blender/pulls/156439

Fingers crossed