Replace browser-encrypt-attachment with matrix-encrypt-attachment (#7795)

* Replace browser-encrypt-attachment with matrix-encrypt-attachment

matrix-encrypt-attachment is maintained and includes TS typings

* Upgrade matrix-encrypt-attachment to latest with default exports

package.json

@@ -59,7 +59,6 @@
     "@types/geojson": "^7946.0.8",
     "await-lock": "^2.1.0",
     "blurhash": "^1.1.3",
-    "browser-encrypt-attachment": "^0.3.0",
     "browser-request": "^0.3.3",
     "cheerio": "^1.0.0-rc.9",
     "classnames": "^2.2.6",
@@ -88,6 +87,7 @@
     "lodash": "^4.17.20",
     "maplibre-gl": "^1.15.2",
     "matrix-analytics-events": "github:matrix-org/matrix-analytics-events.git#daad3faed54f0b1f1e026a7498b4653e4d01cd90",
+    "matrix-encrypt-attachment": "^1.0.3",
     "matrix-events-sdk": "^0.0.1-beta.7",
     "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
     "matrix-widget-api": "^0.1.0-beta.18",