release: v1.2.0 — community-ready, full docs, PDF guide

Critical fixes:
- marketplace.json: fix version 1.0.0→1.2.0, fix email to ***REMOVED***
- main.canvas: remove 5 broken file references (gitignored files)
- community-plugins.json: deduplicate from 6→4 canonical entries

Vault onboarding:
- wiki/getting-started.md: new onboarding page inside the vault
- wiki/index.md: populate Entities, Sources, Questions, Comparisons sections
- wiki/meta/dashboard.md: fix Dataview queries (was referencing non-existent fields)
- welcome.canvas: add CTA node pointing to getting-started
- CLAUDE.md: replace placeholder text with actual vault description

Docs:
- README.md: complete Plugins section (pre-installed + recommended), CSS Snippets section, Banner usage section, file structure updated
- bin/setup-vault.sh: expanded success message listing all plugins and CSS snippets
- docs/install-guide.md + docs/install-guide.pdf: printable community install guide

Version: 1.1.0 → 1.2.0

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

.claude-plugin/marketplace.json

@@ -2,11 +2,11 @@
   "name": "cosmic-brain-marketplace",
   "owner": {
     "name": "AgriciDaniel",
-    "email": "github@agricidaniel"
+    "email": "***REMOVED***"
   },
   "metadata": {
     "description": "cosmic-brain — Claude + Obsidian knowledge companion by AgriciDaniel",
-    "version": "1.0.0"
+    "version": "1.2.0"
   },
   "plugins": [
     {
@@ -17,7 +17,7 @@
         "ref": "main"
       },
       "description": "Claude + Obsidian knowledge companion. Sets up a persistent, compounding wiki vault. Covers memory management, session notetaking, knowledge organization, and agent context across projects.",
-      "version": "1.0.0",
+      "version": "1.2.0",
       "author": {
         "name": "AgriciDaniel",
         "url": "https://github.com/AgriciDaniel"