Remove linux support

docs/ARCHITECTURE.md

@@ -111,7 +111,7 @@ click position. Three pieces make that hold:
 
 1. **OS click events** (`app/capture.js`): a low-level mouse hook on Windows
    (`CLICK x y button unixMs` lines), an `xinput test-xi2 --root` watcher on
-   X11. The Linux parser carries event-time `root:` coordinates and merges
+   X11. The Linux (WIP) parser carries event-time `root:` coordinates and merges
    raw/regular twin blocks structurally — there is no time-based debounce
    that could drop fast clicks, only suppression of identical duplicate
    deliveries. Physical coordinates convert to DIP via

docs/GETTING_STARTED.md

@@ -25,9 +25,9 @@ That installs Electron and the local packaging tools used by the scripts.
 npm start
 ```
 
-The first launch creates the local StepForge data directory. On Linux it is
-usually under `~/.local/share/stepforge`. On Windows it is usually under
-`%APPDATA%/stepforge`.
+The first launch creates the local StepForge data directory. On Linux (WIP)
+it is usually under `~/.local/share/stepforge`. On Windows it is usually
+under `%APPDATA%/stepforge`.
 
 ## 3. Create your first guide
 
@@ -95,4 +95,5 @@ If you want to find commands quickly, press `Ctrl+/` for Quick Actions.
 1. `bash scripts/build-release.sh` assembles the offline release layout.
 2. `npm run package:windows` creates the Windows installer `.exe` in
    `releases/`.
-3. `bash scripts/package-linux.sh` creates Linux release artifacts.
+3. `bash scripts/package-linux.sh` creates Linux release artifacts (WIP;
+   local only).