Editor Harvest Plan

Handle $ARGUMENTS.

Use this after editor-test-harvester has produced a report and the user wants one owner lane processed into an execution-grade plan.

Examples:

editor-harvest-plan slate-v2 tinymce
editor-harvest-plan slate-v2 .tmp/editor-test-harvester/tinymce/report.md
editor-harvest-plan docs/editor-test-harvester/tiptap/report.md --lane slate-v2

For slate-v2, this means: read the harvest, find every raw Slate candidate, apply slate-plan, and produce a plan that accounts for all Slate-specific tests. It does not mean blindly port every upstream test.