chore(ignore): add *.exe to .dockerignore and .gitignore to exclude executable files

.dockerignore

@@ -91,3 +91,5 @@ blob-report/
 /packaging/arch/*.pkg.tar.zst
 /packaging/arch/MeshChatX/
 /packaging/arch/reticulum-meshchatx/
+
+*.exe

.gitignore

@@ -101,4 +101,6 @@ out/
 
 electron/backend-manifest.json
 
-scripts/private/
+scripts/private/
+
+*.exe