chore: remove word-to-tex

chore: remove pandoc-citeproc-export, pdf2md-academic, paper-mapping, latex-sentence-surgery

chore: remove paragraph-move-analysis, tech-scout, ai-vibe-writing-skills, academic-paper-pipeline

docs: update README skill count 20→17

chore: remove non-original and low-value skills

docs: fix install URL

fix: de-embed humanizer nested git repo

docs: add contributing guide

docs: add README

feat: add install and uninstall scripts

fix: sanitize hardcoded personal paths

feat: add 20 research skills

chore: init repo skeleton