Enhance provider system with dynamic package resolution and improved logging

- Add npm registry lookup for AI SDK packages with fallback support
- Enhance error logging with cause information
- Add timing deltas to log output for performance monitoring

🤖 Generated with [opencode](https://opencode.ai)

Co-Authored-By: opencode <noreply@opencode.ai>

packages/opencode/src/util/error.ts

@@ -29,7 +29,10 @@ export abstract class NamedError extends Error {
       ) {
         super(name, options)
         this.name = name
-        log.error(name, this.data)
+        log.error(name, {
+          ...this.data,
+          cause: options?.cause?.toString(),
+        })
       }
 
       static isInstance(input: any): input is InstanceType<typeof result> {