Add cross-machine sync tooling (clone/pull/push all module repos)

repos.txt + sync-*.sh let any machine (Mac or Windows/Git Bash) hydrate all 49
module repos and keep them in sync via GitHub+gitea. Pulls are fast-forward only
(never clobber local work); pushes send commits only and flag uncommitted repos.
See SYNC.md for the two-machine workflow.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

sync-refresh-list.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+# Regenerate repos.txt from the actual module folders present here (any top-level
+# folder that is its own git repo with a github.com/gsinghpal origin). Run this
+# after you add or remove a module repo, then commit repos.txt so both machines
+# pick up the change.
+#
+#   bash sync-refresh-list.sh
+set -uo pipefail
+cd "$(dirname "$0")" || exit 1
+
+{
+  echo "# Module repos that live as independent git repos inside this folder."
+  echo "# Owner: github.com/gsinghpal/<name>  +  gitea git.nexasystems.ca/admin/<name>"
+  echo "# One repo name per line. Used by sync-*.sh. Regenerate with: bash sync-refresh-list.sh"
+  for d in */; do
+    d="${d%/}"
+    [ -d "$d/.git" ] || continue
+    url=$(git -C "$d" remote get-url origin 2>/dev/null || true)
+    case "$url" in *github.com/gsinghpal/*) echo "$d" ;; esac
+  done
+} > repos.txt.tmp && mv repos.txt.tmp repos.txt
+
+echo "repos.txt now lists $(grep -cvE '^\s*#|^\s*$' repos.txt) repos"