Rename install doc to INSTALL and add full dependency checks

README.md

@@ -15,7 +15,7 @@ This repo is organized similarly to `obra/superpowers` and is designed to scale
 ai-coding-skills/
 ├── README.md
 ├── docs/
-│   └── install.md
+│   └── INSTALL.md
 ├── skills/
 │   ├── _template/
 │   │   └── SKILL.md
@@ -47,7 +47,7 @@ ai-coding-skills/
 | web-automation | claude-code | Playwright + Camoufox browsing/scraping/auth automation | Ready |
 | web-automation | opencode | Playwright + Camoufox browsing/scraping/auth automation | Ready |
 
-See install instructions: `docs/install.md`
+See install instructions: `docs/INSTALL.md`
 
 ## Compatibility Policy