feat(core)!: compio executor

[George-Miao]

Which issue does this PR close?

Closes #8037.

Rationale for this change

It's good to have another option for user to choose, even if it's not a popular one. I personally would really want to use OpenDAL on compio.

What changes are included in this PR?

This PR brings two major changes:

• Refactored Execute's timeout function so that timeout layer can use Execute::timeout directly.
• Implement CompioExecutor.

Are there any user-facing changes?

Execute trait is changed. Though I believe core is considered a hidden API that user should not use directly. Not very sure if this consititutes a breaking change.

AI Usage Statement

I used codex's gpt-5.6-sol to brainstorm & implement part of the PR. I have thoroughly reviewed the change and fixed any issue I found before submitting this PR.

[Xuanwo]

Nice changeset! So happy to see it really happens!

The only thing we need to discuss is the merge process. I think @erickguan is working on a new patch release, we can merge once the new patch has been released.

[Xuanwo]

This will be a breaking change. We need to hold on this PR until our next minor release.

[George-Miao]

agreed

[Xuanwo]

One more question, does compio executor work along with http-transport-reqwest?

[George-Miao]

One more question, does compio executor work along with http-transport-reqwest?

no. we'd have to add a new transport layer with cyper which is built on hyper and compio's tcp and tls layer.

[erickguan]

The only thing we need to discuss is the merge process. I think @erickguan is working on a new patch release, we can merge once the new patch has been released.

The master branch seems to have a CI failure. Once that is fixed, I'll release 0.58.2. And we can merge this PR too.

[Xuanwo]

no. we'd have to add a new transport layer with cyper which is built on hyper and compio's tcp and tls layer.

If so, can we have an end-to-end working demo first? Then we can think about how to merge it into OpenDAL. Maybe in a stack PR way?

[George-Miao]

no. we'd have to add a new transport layer with cyper which is built on hyper and compio's tcp and tls layer.

If so, can we have an end-to-end working demo first? Then we can think about how to merge it into OpenDAL. Maybe in a stack PR way?

sure thing