dev: devenv update, fix legacy pre-commit hooks

devenv.nix

@@ -189,6 +189,21 @@ in {
 
   # https://devenv.sh/scripts/
   enterShell = ''
+    cleanup_stale_git_hook_legacy() {
+      hooks_dir="$(git rev-parse --git-path hooks 2>/dev/null)" || return 0
+
+      for legacy_hook in "$hooks_dir"/*.legacy; do
+        [ -e "$legacy_hook" ] || continue
+
+        if grep -Fq "File generated by pre-commit: https://pre-commit.com" "$legacy_hook"; then
+          rm -f "$legacy_hook"
+          echo "Removed stale legacy git hook: $legacy_hook"
+        fi
+      done
+    }
+
+    cleanup_stale_git_hook_legacy
+
     echo
     elixir --version
     echo