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>

index.ts

@@ -3,7 +3,7 @@
  * This exports the main function for programmatic usage
  */
 
-export type { Agent, AgentRunContext, AgentResult } from "./agents/shared.ts";
+export type { Agent, AgentResult, AgentRunContext } from "./agents/shared.ts";
 export {
   type Inputs as ExecutionInputs,
   type MainResult,