v1.1.0/#18: windows MSI build — sync.sh + tracked manifest

windows/ was previously an untracked working tree with manually-
copied .lua files that drifted ~6 months out of date (missed every
feature added since April 2026). #18 introduces Option 1 from the
issue body: build-time sync.

New tracked files:
  - windows/sync.sh — copies root {lmcp,server,json}.lua to pkg/.
    Idempotent; run before WiX. Catches missing source files; logs
    each sync.
  - windows/README.md — workflow doc + tracked-vs-generated map.
  - windows/lmcp.wxs — MSI manifest (Version bumped 0.1.0 → 1.1.0).
  - windows/pkg/{install_service,start}.bat — Windows service
    installer + launcher (now tracked; they were already in pkg/).

New .gitignore at repo root:
  - windows/pkg/{lmcp,server,json}.lua — regenerated by sync.sh
  - windows/pkg/lua/ — bundled Lua + LuaSocket runtime (downloaded
    separately, not in git)
  - editor noise (*.swp, *.swo, .DS_Store)

Verification (Phase 7):
  $ ./windows/sync.sh
    synced lmcp.lua
    synced server.lua
    synced json.lua
  $ diff lmcp.lua windows/pkg/lmcp.lua  → empty
  $ git ls-files -o --exclude-standard windows/
    windows/README.md
    windows/lmcp.wxs
    windows/pkg/install_service.bat
    windows/pkg/start.bat
    windows/sync.sh
  $ git check-ignore windows/pkg/{lmcp,server,json}.lua  → all 3 ignored

The "missed every feature since April" failure mode this fixes:
running sync.sh before each MSI build now guarantees pkg/ matches
master. Forgetting to run it is failure-loud (the MSI ships the
last sync's snapshot, easy to spot in QA), not silent (the manifest
points at fresh files that mismatch root).

Closes v1.1.0 milestone with #11, #20.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

windows/README.md

@@ -0,0 +1,41 @@
+# lmcp Windows MSI build
+
+This directory contains the WiX manifest and packaging files for the
+Windows MSI build of lmcp.
+
+## Workflow
+
+```sh
+# 1. Pull the Lua + LuaSocket runtime into pkg/lua/ (one-time, see below).
+# 2. Sync the lmcp .lua sources from the root of the repo:
+./sync.sh
+# 3. Bump windows/lmcp.wxs `Version="…"` to match the release tag.
+# 4. Invoke WiX:
+candle.exe lmcp.wxs
+light.exe lmcp.wixobj -o lmcp-1.x.y.msi
+```
+
+## What's tracked vs. generated
+
+- **Tracked** (edit in git):
+  - `lmcp.wxs` — WiX MSI manifest
+  - `sync.sh` — copies root .lua sources → `pkg/`
+  - `README.md` — this file
+  - `pkg/install_service.bat` — Windows service installer
+  - `pkg/start.bat` — manual launcher
+
+- **Generated / external** (gitignored):
+  - `pkg/lmcp.lua`, `pkg/server.lua`, `pkg/json.lua` — produced by
+    `sync.sh`. Never edit directly; edit the root files and re-sync.
+  - `pkg/lua/` — the Lua + LuaSocket runtime drop-in. Download
+    separately and place here. Suggested source: the lua-binaries
+    project (https://github.com/rjpcomputing/luaforwindows) or a
+    similar pre-built bundle. The MSI expects `pkg/lua/lua.exe`,
+    `pkg/lua/lua54.dll`, and the `pkg/lua/socket/` + `pkg/lua/mime/`
+    subdirectories per the manifest.
+
+## Issue history
+
+Issue #18 (closed in v1.1.0) introduced this workflow after the
+`pkg/` lua sources had silently drifted ~6 months out of date,
+missing every feature added since April 2026.