.env.example: committable template (all 13 skill env vars commented with
defaults; secrets use replace_me, no plaintext). .gitignore already carves
it out via !.env.example.
scripts/generate-env.sh: creates .env from .env.example if absent, no-ops
if present, --force overwrites with a .env.bak backup. Placed under a new
top-level scripts/ dir so it is committable without touching skills/*.
Verified on -L claude-env2-test (create/no-op/force/bad-arg paths).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
