Replace the global ~/.config/git/ignore mechanism with a committed,
per-project docs/.gitignore whose entries `specs/` and `plans/` are
relative to docs/. The ignore now travels with each repo instead of
living in the user's global excludes.
specify (Step 3) and planner (intro) create docs/.gitignore on demand
if a project has not set it up yet, so a spec/plan can never become
committable. conventions.md § File layout is the single source; the
onboarding fragment tells a new project to set it up.
The global ~/.config/git/ignore block is removed separately (it is
outside this repo).
Brummel
ea54be6535