Stage 3b of the split. acme becomes its own KTextEditor plugin: new
src/acme/acmeplugin.{h,cpp} (AcmePlugin/AcmeView) + acmeplugin.json
("[deft:nineify] acme"), built as deft_acme.so with its own event filter:
the ^A/^E/^H/^U/^W line keys, double-click bracket/quote pair selection, and
the left-button mouse chords (left+middle=Cut, left+right=Paste) plus X11
primary-paste suppression. The bracket/quote/step helpers move here too.
The core deft plugin drops all acme code; its event filter now only
intercepts the Alt+X/P/G launcher-door keys for palette + switch.
Levi Neely