Remove committed guest-tools .EXE; drop now-unneeded windows-sign patch

VBMOUSE.EXE is the DOS TSR build artifact (only vbmouse.drv is referenced by OEMSETUP.INF). With no .exe under guest-tools/ the @electron/windows-sign exclude patch is no longer needed. .gitignore now covers all guest-tools/**/*.exe.

.gitignore

@@ -15,6 +15,7 @@ trusted-signing-metadata.json
 .env
 electron-windows-sign.log
 .npmrc
-guest-tools/agent/W95TOOLS.EXE
+guest-tools/**/*.EXE
+guest-tools/**/*.exe
 /.claude/scheduled_tasks.lock
 /.claude/worktrees/

patches/@electron+windows-sign+1.2.2.patch

@@ -1,15 +0,0 @@
-diff --git a/node_modules/@electron/windows-sign/dist/cjs/files.js b/node_modules/@electron/windows-sign/dist/cjs/files.js
-index 59a370e..27f9bbd 100644
---- a/node_modules/@electron/windows-sign/dist/cjs/files.js
-+++ b/node_modules/@electron/windows-sign/dist/cjs/files.js
-@@ -49,6 +49,10 @@ function getFilesToSign(options, dir) {
-     }
-     for (const file of files) {
-         const fullPath = path_1.default.resolve(dir, file);
-+        // windows95 patch: skip 16-bit guest binaries that signtool can't sign
-+        if (/[\\/]guest-tools[\\/]/i.test(fullPath)) {
-+            continue;
-+        }
-         if (fs_extra_1.default.statSync(fullPath).isDirectory()) {
-             // If it's a directory, recurse
-             result.push(...getFilesToSign(options, fullPath));