dsh-browser-install: auto-install Playwright Chromium and bridge it for dsh-ego-browser

On load, ensures the Playwright browser target (default: chromium) is installed
via `npx --yes playwright install chromium --with-deps` (background when missing,
so profile startup is not blocked), then symlinks the installed binary at
/usr/local/bin/google-chrome-stable (+ chromium). That exact name is what
dsh-ego-browser's PATH scan and its bundled --no-sandbox wrapper both look for,
so root/Docker containers get a working agent browser with zero manual PATH,
env-var or wrapper steps. Pre-existing user binaries/wrappers are never
clobbered. Ships as a dsh bundle (plain ESM, no build step); install via
`dsh plugin --profile web add github:<you>/dsh-browser-install#main` and update
with `dsh plugin --profile web update` (branch ref resolves the tip).

package.json

@@ -0,0 +1,35 @@
+{
+  "name": "dsh-browser-install",
+  "version": "0.1.0",
+  "description": "Auto-installs Playwright Chromium (npx playwright install chromium --with-deps) into the DSH container and bridges it onto PATH so dsh-ego-browser finds it without manual env-var or wrapper steps.",
+  "type": "module",
+  "main": "index.js",
+  "license": "MIT",
+  "engines": {
+    "node": ">=22"
+  },
+  "dependencies": {
+    "@deepseek-ai/schemastery": "^3.18.3"
+  },
+  "dsh": {
+    "engines": {
+      "dsh": ">=0.1.2-rc.1"
+    },
+    "bundle": {
+      "patch": "./cordis.patch.yml"
+    }
+  },
+  "files": [
+    "index.js",
+    "cordis.patch.yml",
+    "README.md"
+  ],
+  "keywords": [
+    "dsh",
+    "dsh-plugin",
+    "playwright",
+    "chromium",
+    "ego-browser",
+    "browser"
+  ]
+}