Add README, plugin citations, and multi-platform release CI.

Ship screenshots and third-party notices for the desktop shell, and
package Windows, macOS, deb, rpm, and Flatpak from GitHub Releases.

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

plugins/dsh-desktop-vision/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "dsh-desktop-vision",
+  "version": "0.1.4",
+  "private": true,
+  "type": "module",
+  "exports": {
+    ".": "./index.js",
+    "./client": "./client.js",
+    "./package.json": "./package.json"
+  },
+  "dsh": {
+    "bundle": {
+      "patch": "./cordis.patch.yml"
+    },
+    "client": {
+      "inject": [
+        "@deepseek-ai/dsh-client-ui-settings"
+      ],
+      "platform": "web",
+      "immediately": true
+    }
+  }
+}