Rename the C++ namespace katecustom -> deft and include guards
KATECUSTOM_* -> DEFT_* across all sources. Rename the plugin artifact
olliepalette.so -> deft.so (CMake target 'deft') and set the plugin
display name to 'Deft'. Update README title/install paths.
File names, class names (Ollie*), and the src/ directory grouping are
left for the follow-up stages that split features into per-plugin .so's
([deft:nineify] / [deft:util]).
queryCommand/commandList do not see our auto-registered KTextEditor::Command
on this build, so the palette now calls OllieCommands::runVerb directly.
Rewrite the live test to exercise runVerb against a real doc/view (case,
rot13, sort, uuid, base64 round-trip). Document the command-line limitation.
Levi Neely