Redact personal data before publishing as public repo

- config/git/gitconfig: replace real name, email, SSH signing key, and
  self-hosted git credential URL with placeholder values

- stages/06-scripts.sh: remove hardcoded personal email from bw login;
  CLI prompts interactively

- config/shell/zshrc.local.example: replace personal server URLs
  (Nextcloud, LiteLLM proxy), university email address, institution-
  specific Canvas LMS URL, and identifying Canvas key prefix with
  generic example.com placeholders

- TODO.md: replace personal email and Nextcloud URL in code examples
  with generic placeholders

- stages/07-uv-projects.sh: remove private org name from comment

stages/06-scripts.sh

@@ -154,7 +154,7 @@ if [ "${_do_bw_setup:-false}" = true ]; then
     info "If you have 2FA enabled, you'll be prompted for that too."
     echo "----------------------------------------"
     echo ""
-    bw login hi@julianprester.com || {
+    bw login || {
       warn "Bitwarden login failed or was cancelled."
       warn "You can run 'bw login' manually later."
     }

stages/07-uv-projects.sh

@@ -5,7 +5,7 @@
 #  and installs them via 'uv tool install' (editable mode from local path).
 # ===========================================================================
 #  These are Julian's own CLI tools — the ones installed on Pop via uv.
-#  Each has a remote on github.com/julianprester/ (or re3-work/) and a
+#  Each has a remote on github.com/julianprester/ and a
 #  pyproject.toml defining the package.
 #
 #  Tools without a public remote (oracle, panac, skill-eval, mondada) are
@@ -21,7 +21,7 @@ export PATH="$HOME/.local/bin:$PATH"
 # ---- Define tool repos ----
 # Format: "repo_name:github_org:has_pyproject"
 # repo_name     = directory name under ~/Development/
-# github_org    = GitHub org (julianprester or re3-work)
+# github_org    = GitHub org or username
 # has_pyproject = true if it has pyproject.toml and should be uv-installed
 
 TOOLS=(