skill: improve SKILL.md with bunx fallback, required flags, and --no-pager caveat

[c-99-e]

A few practical improvements based on real usage friction:

• Prerequisites: Added bunx linear as a zero-install fallback for when linear isn't on PATH
• Discovering Options: Added a note about commands with non-obvious required flags — specifically that issue list requires --sort (valid values: manual, priority) and --team, and that --no-pager is only supported on issue list

[schpet]

thanks! this skill is pretty weak so appreciate refinements based on real usage

[c-99-e]

Thanks for the catch! The bunx linear example was actually working for me because @schpet/linear-cli was already installed locally in my project; bunx just picked up the local binary. Fixed it to use npx @schpet/linear-cli with the correct package name throughout.