Add imported functions callback samples

[kylo5aby]

In scenarios that require permission control, users may want to know if a Wasm app has the authority to use the native APIs it's about to import. To address this, we've added a callback that executes when the Wasm module loads an imported function.

• add a callback execute API
• add a sample to demonstrate how to use it.

[lum1n0us]

I still think we should add some description in the comments of wasm_runtime_get_import_xxx() in wasm_export.h, perhaps introducing this sample.

Need to execute samples in CI.

[yamt]

the ci failure doesn't seem like a fault of this PR.
cf. #4616

[yamt]

can you rebase after #4620?

[kylo5aby]

can you rebase after #4620?

resolved. I see some tests failed

STDERR:
thread 'main' panicked at 'expected errno NOENT; got NOTDIR', src/bin/path_symlink_trailing_slashes.rs:7:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

that maybe a github action CI Windows env error.

[yamt]

can you rebase after #4620?

resolved. I see some tests failed

STDERR:
thread 'main' panicked at 'expected errno NOENT; got NOTDIR', src/bin/path_symlink_trailing_slashes.rs:7:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

that maybe a github action CI Windows env error.

#4633

[yamt]

restarting SGX 143
https://github.com/bytecodealliance/wasm-micro-runtime/actions/runs/17752229428/job/50449056992?pr=4606

[lum1n0us]

Please rebase after #4633

[kylo5aby]

Please rebase after #4633

resolved.