Swift embedded support

[kassane]

Summary

Add Swift 6 (embedded module) support

Note: Currently, snapshot version (nightly)

Impact

Another Safe Programming Language alternative with C++ and C FFI support. (like, D and Rust)

Testing

$ qemu-system-riscv32 \
    -semihosting \
    -M virt,aclint=on \
    -cpu rv32 -smp 8 \
    -bios none \
    -kernel nuttx -nographic
NuttShell (NSH) NuttX-12.6.0-RC1
nsh> hello_swift
Hello from Swift embedded!

• hello_swift added nuttx-apps#2525

cc: @lupyuen
@rauhul FYI

References

• Swift Embedded - Vision
• Swift Embedded - manual
• snapshots
• swift-embedded-examples - GitHub

[rauhul]

Very cool! After this PR is accepted, I'd love to include a link to a sample project from swift-embedded-examples!

[xiaoxiang781216]

@kassane could you create a new patch to enable hello_swift ci?

[anchao]

@rauhul @kassane I am surprised that Apple is using NuttX in the embedded devices?

[lupyuen]

@kassane Thank you so much for adding Embedded Swift to NuttX! If you need help enabling hello_swift in NuttX CI: I wrote a guide about modding NuttX CI...

• "Building the Docker Image for NuttX CI"
• "Downloading the Docker Image for NuttX CI"