Add upload tool and related APIs (#187)

* Add utils for r2 upload

* Add the tool and new routes

* fix auth issue

* sign headers

* add comment

* use our own API key to auth signed uploads

* Restructure things slightly

* tweak

* tweak

* add comments

* tweak

* revert a thing

* twaek

* drop mime type filtering

* new incarnation of mime type filtering

* jsut allow all octet-streams

* simplify further

* tweak

* update lockfile

---------

Co-authored-by: Colin McDonnell <colinmcd94@gmail.com>

package.json

@@ -42,6 +42,7 @@
     "dotenv": "^17.2.3",
     "execa": "^9.6.0",
     "fastmcp": "^3.26.8",
+    "file-type": "^21.3.0",
     "package-manager-detector": "^1.6.0",
     "semver": "^7.7.3",
     "table": "^6.9.0",