docs: clarify scheduledTime is required for all posts

fix(linkedin-analytics): correct REST API endpoints

docs: add REST API fallback to all skills

fix: correct MCP server URL and add type: http

feat(skills): add x-post, bluesky-post, and social-post skills

fix(pricing): correct plan requirements - only X/Twitter needs Pro

docs: add complete onboarding flow and pricing info

feat(skills): add instagram-post and tiktok-post skills

fix(skills): update all skills with verified documentation facts

feat: add 4 agent skills for social media automation

Initial commit