add scan feeds api to scan feeds from opml or html

packages/api/package.json

@@ -83,6 +83,7 @@
     "private-ip": "^2.3.3",
     "rss-parser": "^3.13.0",
     "sanitize-html": "^2.3.2",
+    "sax": "^1.3.0",
     "search-query-parser": "^1.6.0",
     "snake-case": "^3.0.3",
     "supertest": "^6.2.2",
@@ -122,6 +123,7 @@
     "@types/oauth": "^0.9.1",
     "@types/private-ip": "^1.0.0",
     "@types/sanitize-html": "^1.27.1",
+    "@types/sax": "^1.2.7",
     "@types/sinon": "^10.0.13",
     "@types/sinon-chai": "^3.2.8",
     "@types/supertest": "^2.0.11",