Add src/commands/: texttransforms (pure, unit-tested string transforms) and
olliecommands (a KTextEditor::Command registering sort, rsort, case, b64enc,
b64dec, rot13, uuid, pipe). Verbs act on the selection in place, or the whole
document when nothing is selected. 'pipe <shell>' runs sh -c <shell> with the
selection on stdin and replaces it with stdout (the user types the command,
so shell execution is intended). The command object is created once by
OlliePlugin and auto-registers with the global editor.
15 transform unit tests; 6 ctest suites green overall. Verbs are reachable
from Kate's command line; surfacing them in the M-x palette is a follow-up
(they are Commands, not QActions).
217d042a1b