WP-0001: feedback channels, CI, pre-commit, telemetry docs

Add kaizen-agentic feedback CLI, Gitea issue templates, CI workflow,
pre-commit hooks, FEEDBACK/TELEMETRY docs, and cross-platform path tests.
Improve CLI registry error messages; remove agents_backup scaffolding.
Apply black formatting across src/tests for CI consistency.

State Hub message sent to agentic-resources for Helix correlation doc link.

.gitea/ISSUE_TEMPLATE/feedback.md

@@ -0,0 +1,21 @@
+---
+name: General feedback
+about: Share experience, ideas, or adoption feedback
+title: "[feedback] "
+labels: feedback
+---
+
+## Context
+
+<!-- How are you using kaizen-agentic? (project type, agents used, workflow) -->
+
+## What worked well
+
+## What was confusing or friction-heavy
+
+## Suggestions
+
+## Optional: metrics / telemetry context
+
+If relevant, note whether you use project metrics (`.kaizen/metrics/`) or Helix Forge
+fleet capture — helps us prioritize integration improvements.