new feature: go binding provides context-based API

### Feature Description

golang uses `context` to propagate timeout and cancellation, I'm think all IO operation interfaces should take context as the first argument.

For now, I don't see timeout layer when we construct the operator in c-layer
https://github.com/apache/opendal/blob/320068740d3cc78bdcbc5cbc9ebe1b9901cbc1ca/bindings/c/src/operator.rs#L87

### Problem and Solution

N/A

### Additional Context

_No response_

### Are you willing to contribute to the development of this feature?

- [ ] Yes, I am willing to contribute to the development of this feature.

Start with bindings/c/src/operator.rs around the operator construction referenced in the issue, then inspect the Go binding's I/O interfaces and existing tests. Clarify which operations must accept context, how cancellation and timeouts cross the binding boundary, and define completion criteria before implementation; the issue currently provides no concrete solution or test locations.

Written by the indexing model from the issue text.