feat(driver): add more flags to Extra

[George-Miao]

No description provided.

[Copilot]

Pull request overview

Adds additional io_uring-specific capabilities to compio-driver::Extra (SQE flags + CQE helpers) and wires those extras into SQE creation so operations can be configured more flexibly at submission time.

Changes:

• Extend io_uring Extra to track SQE flags (link/hardlink/drain) separately from CQE flags and expose new setters/getters.
• Apply Extra to OpEntry during SQE creation and refactor io_uring push path to use a unified create_entry::<FALLBACK>() helper.
• Adjust Extra::get_personality API to be io_uring-only via io::Result, and update the personality test accordingly.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
compio-driver/tests/personality.rs	Updates personality assertions to the new io::Result-based API.
compio-driver/src/sys/iour/mod.rs	Adds OpEntry::with_extra to apply Extra settings to SQEs and refactors the push loop to use the new entry-creation helper.
compio-driver/src/sys/iour/extra.rs	Splits SQE vs CQE flags, adds SQE flag setters, and adds notif/notification support.
compio-driver/src/sys/extra.rs	Introduces an iour_only! macro to generate io_uring-only getters/setters and expands the public Extra API surface.
compio-driver/src/key.rs	Adds RawOp::create_entry::<FALLBACK>() helper used by the io_uring driver push path.

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