Release 1.0.7: Linux AppImage (x64/arm64) CI, merge update feed, docs

- electron-builder linux + qemu cross arm64 on ubuntu-22.04 job
- sync-update-feed: merge copy, ARTIFACT_LINUX, .appimage
- GITEA_AUTO_UPDATE + MANUAL_MAC_UPDATE_UPLOAD

Co-authored-by: Cursor <cursoragent@cursor.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "DndGamePlayer",
-  "version": "1.0.6",
+  "version": "1.0.7",
   "description": "DNDGamePlayer — редактор и проигрыватель игр",
   "main": "dist/main/index.cjs",
   "scripts": {
@@ -18,7 +18,8 @@
     "pack": "npm run build && node scripts/release-win-prep.mjs && electron-builder",
     "pack:dir": "npm run build && node scripts/release-win-prep.mjs && electron-builder --dir",
     "pack:mac": "npm run build && electron-builder --mac",
-    "pack:win": "npm run build && node scripts/release-win-prep.mjs && electron-builder --win"
+    "pack:win": "npm run build && node scripts/release-win-prep.mjs && electron-builder --win",
+    "pack:linux": "npm run build && electron-builder --linux"
   },
   "keywords": [],
   "author": "",
@@ -132,6 +133,24 @@
       ],
       "icon": "build/icon.ico"
     },
+    "linux": {
+      "target": [
+        {
+          "target": "AppImage",
+          "arch": [
+            "x64",
+            "arm64"
+          ]
+        }
+      ],
+      "category": "Game",
+      "maintainer": "DNDGamePlayer",
+      "synopsis": "DNDGamePlayer — редактор и проигрыватель игр",
+      "icon": "build/icon.png"
+    },
+    "appImage": {
+      "artifactName": "${productName}-${version}-${arch}.${ext}"
+    },
     "nsis": {
       "oneClick": false,
       "allowToChangeInstallationDirectory": true,