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)

nanoclaw.sh

@@ -240,7 +240,7 @@ if [ "$(uname -s)" = "Linux" ] && [ "$(id -u)" -eq 0 ]; then
       printf '  %s\n' "$(dim '3. Enable passwordless sudo:    echo "nanoclaw ALL=(ALL) NOPASSWD:ALL" | tee /etc/sudoers.d/nanoclaw')"
       printf '  %s\n' "$(dim '4. Log out:                     exit')"
       printf '  %s\n' "$(dim '5. Log back in as the new user: ssh nanoclaw@your-server')"
-      printf '  %s\n' "$(dim '6. Clone the repo:              git clone https://github.com/qwibitai/nanoclaw.git && cd nanoclaw')"
+      printf '  %s\n' "$(dim '6. Clone the repo:              git clone https://github.com/nanocoai/nanoclaw.git && cd nanoclaw')"
       printf '  %s\n\n' "$(dim '7. Re-run setup:               bash nanoclaw.sh')"
       exit 1
       ;;