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.md

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+# Syncing Odoo-Modules across machines (Mac + Windows)
+
+Each module/suite folder here is its **own git repo** (private on GitHub at
+`gsinghpal/<name>`, mirrored to gitea `admin/<name>`). This parent folder is a
+separate repo that holds the shared files (CLAUDE.md, docs, scripts, these sync
+helpers). The cloud (GitHub) is the hub: both machines push to it and pull from it.
+
+Nothing here ever deletes your work. Pulls are fast-forward only, so local changes
+are never overwritten; pushes only send commits.
+
+## First-time setup on a new machine (e.g. the Windows PC)
+
+1. Install **Git** (Git for Windows includes "Git Bash", which runs these scripts).
+2. Sign in to GitHub once so git can push/pull:
+   - easiest: `gh auth login`  (or let Git Credential Manager prompt on first pull)
+3. Get everything:
+   ```
+   git clone https://github.com/gsinghpal/Odoo-Modules.git
+   cd Odoo-Modules
+   bash sync-clone-all.sh
+   ```
+   That clones the parent, then all 49 module repos into place.
+
+(gitea is an optional second mirror. The first push to it will ask for your
+`git.nexasystems.ca` login. If you only use GitHub, those gitea lines just fail
+quietly and GitHub stays the source of truth.)
+
+## Daily workflow (same on Mac and Windows)
+
+- **Before you start:** `bash sync-pull-all.sh`  - pulls the latest for the parent
+  and every module. Anything with local changes or a diverged history is skipped and
+  listed, so you can handle it yourself.
+- **Do your work**, then **commit inside the module(s) you changed**:
+  ```
+  cd fusion_clock
+  git add -A
+  git commit -m "..."
+  cd ..
+  ```
+- **When done:** `bash sync-push-all.sh`  - pushes every committed change to GitHub
+  + gitea, and flags any repo that still has uncommitted changes (so nothing is
+  silently left behind).
+
+## Golden rule for two machines
+
+Push from the machine you worked on **before** you switch to the other one, and run
+`sync-pull-all.sh` on the other machine **before** you start. That keeps both in sync
+and avoids diverged histories.
+
+## Helper scripts
+
+| Script | What it does |
+|--------|--------------|
+| `sync-clone-all.sh` | Clone any module repo listed in `repos.txt` that isn't here yet. |
+| `sync-pull-all.sh`  | Fast-forward pull the parent + all modules (safe, never clobbers). |
+| `sync-push-all.sh`  | Push committed work for the parent + all modules to GitHub + gitea. |
+| `sync-refresh-list.sh` | Rebuild `repos.txt` from the repos present here (after adding/removing a module). |
+| `repos.txt` | The list of module repo names the scripts act on. |