Merge pull request #2 from zaus/main

Fix installation instructions in README

fix: inappropriately nested/indented lists

Update command format in README.md

Remove build scripts

Add 7 design plugins (53 skills, 23 commands) and update README

Add plugin.json for design systems

Create synthesis guide for research data

Create usability test plan template

Create interview.md with preparation and synthesis guidelines

Create discover.md for user research cycle

Create SKILL.md for Jobs-to-Be-Done framework

Add SKILL.md for affinity diagram methodology

Create diary study plan template

Add card sort analysis documentation