chore: rename remaining qwibitai/nanoclaw references to nanocoai/nanoclaw

Sweep of outbound strings, doc URLs, comments, and clone instructions
that were missed in the original org rename. One both-match case in
setup/lib/channels-remote.sh (URL detection) accepts either name so
existing forks with a `qwibitai` remote continue to resolve cleanly;
everywhere else is a straight rename.

Historical mentions left intact:
- CHANGELOG.md (v2.0.0 entry, frozen history)
- .claude/skills/add-gmail-tool/SKILL.md (pre-v2 qwibitai skill — historical)
- repo-tokens/badge.svg (auto-regenerated by update-tokens.yml)

repo-tokens/action.yml

@@ -114,7 +114,7 @@ runs:
         with open(readme_path, "r", encoding="utf-8") as f:
             content = f.read()
 
-        repo_tokens_url = "https://github.com/qwibitai/nanoclaw/tree/main/repo-tokens"
+        repo_tokens_url = "https://github.com/nanocoai/nanoclaw/tree/main/repo-tokens"
         linked_badge = f'<a href="{repo_tokens_url}">{badge}</a>'
         new_content = marker_re.sub(rf"\1{linked_badge}\2", content)
 
@@ -148,7 +148,7 @@ runs:
             lx = label_w // 2
             vx = label_w + value_w // 2
 
-            repo_tokens_url = "https://github.com/qwibitai/nanoclaw/tree/main/repo-tokens"
+            repo_tokens_url = "https://github.com/nanocoai/nanoclaw/tree/main/repo-tokens"
 
             svg = f'''<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="{total_w}" height="20" role="img" aria-label="{full_desc}">
           <title>{full_desc}</title>