chore: restore .claude commands, agents, helpers & skills (lost in 1df208d)

Restores the entire .claude/ infrastructure that was accidentally deleted
in commit 1df208d ('feat(timeline): add pulse animation for in-flight drag
mutations'). Recovered via git checkout 1df208d^.

Restored:
- .claude/commands/ (gitlooper, sparc/, github/, automation/, monitoring/,
  optimization/, hooks/, plan, implement, research, review, perf, visualaudit)
- .claude/agents/ (core/, github/, sparc/, v3/, swarm/, templates/, ...)
- .claude/helpers/ (41 scripts incl. hook-handler.cjs, statusline.cjs)
- .claude/skills/ (20 skills incl. sparc-methodology, github-*, v3-*)
- .claude/settings.json (hooks configuration)

Also updated all CapaKraken → Nexus references in affected command files.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/commands/analysis/token-usage.md

@@ -0,0 +1,28 @@
+# token-usage
+
+Analyze token usage patterns and optimize for efficiency.
+
+## Usage
+
+```bash
+npx claude-flow analysis token-usage [options]
+```
+
+## Options
+
+- `--period <time>` - Analysis period (1h, 24h, 7d, 30d)
+- `--by-agent` - Break down by agent
+- `--by-operation` - Break down by operation type
+
+## Examples
+
+```bash
+# Last 24 hours token usage
+npx claude-flow analysis token-usage --period 24h
+
+# By agent breakdown
+npx claude-flow analysis token-usage --by-agent
+
+# Export detailed report
+npx claude-flow analysis token-usage --period 7d --export tokens.csv
+```