migrate: consolidate all skills and agents from ~/clawd

- Moved 4 skills: browser-testing, claude-multimedia, exa-search, gravl-research
- Moved 14 agents: architect, backend-dev, browser-tester, coach, data, flight, frontend-dev, gravl-pm, gravl-researcher, nutritionist, research, reviewer, staging, update
- Created symlinks from ~/clawd/skills and ~/clawd/agents back to hub
- Single source of truth in claude-agents-skills repo

agents/gravl-researcher/STATE.md

@@ -0,0 +1,17 @@
+# Gravl Researcher - State
+
+## Aktiv Research
+| Uppgift | Startad | Status | Output |
+|---------|---------|--------|--------|
+| - | - | - | - |
+
+## Köade Tasks
+| Uppgift | Brief | Prioritet |
+|---------|-------|-----------|
+| Fitness App Competitors | `incoming/2026-02-28-fitness-competitors-brief.md` | HÖG |
+
+## Färdiga Rapporter
+Se `reports/` mappen
+
+## Senaste Aktivitet
+- 2026-02-28: Agent skapad