feat: configure Linux packaging (deb + AppImage)

Renamed to 8-cut, 1200x800 window, .deb builds at 3.9MB.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/src-tauri/tauri.conf.json

@@ -1,8 +1,8 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
-  "productName": "client",
+  "productName": "8cut",
   "version": "0.1.0",
-  "identifier": "com.ethanfel.client",
+  "identifier": "com.ethanfel.8cut",
   "build": {
     "beforeDevCommand": "pnpm dev",
     "devUrl": "http://localhost:1420",
@@ -12,9 +12,9 @@
   "app": {
     "windows": [
       {
-        "title": "client",
-        "width": 800,
-        "height": 600
+        "title": "8-cut",
+        "width": 1200,
+        "height": 800
       }
     ],
     "security": {
@@ -23,7 +23,7 @@
   },
   "bundle": {
     "active": true,
-    "targets": "all",
+    "targets": ["deb", "appimage"],
     "icon": [
       "icons/32x32.png",
       "icons/128x128.png",