fix: replace hardcoded skill paths with dynamic {SKILL_BASE} resolution

feat: enrich linkedin-content master-skill with ColdIQ writing guide, engagement data, and post templates

feat: integrate new sub-skills, resources, and fix 9 inconsistencies across master-skills

docs: update README with master-skills + standalone skills structure

fix: remove master-skills/ prefix from all internal paths

Update master-skills with latest changes from coldiq_web

Update master-skills from coldiq_web source

Add files via upload

feat(skills): add combinations and example prompts to all 33 skills

refactor(skills): restructure 6 large skills with references folders

feat: add 33 GTM skills for Claude Code

Initial commit