Restructure editor plugin namespace

[JSCU-CNI]

This PR restructures the editor plugin namespace. The previous implementation deviated from our internal structure for this category of plugins. This patch paves the road for open sourcing more editor plugins.

[codecov]

Codecov Report

Attention: Patch coverage is 89.47368% with 2 lines in your changes missing coverage. Please review.

Project coverage is 76.75%. Comparing base (6c672fa) to head (57de95e).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
dissect/target/plugins/apps/editor/editor.py	80.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #915      +/-   ##
==========================================
- Coverage   76.75%   76.75%   -0.01%     
==========================================
  Files         315      315              
  Lines       27126    27130       +4     
==========================================
+ Hits        20820    20823       +3     
- Misses       6306     6307       +1     

Flag	Coverage Δ
unittests	76.75% <89.47%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.