Migrate to Rust Edition 2024

[LeWimbes]

Summary

This PR updates the project to Rust Edition 2024 and Resolver Version 3.
While updating the dependencies, I chose not to specify the patch version for prost (0.14 instead of 0.14.1) since it never seemed to be specified for other dependencies. Please let me know if this was not your intention.
Rust Edition 2024 requires the explicit use of unsafe blocks in the unsafe extern "C" functions. For now, I have used the blocks in a way that gives them minimal scope. Of course, we could also wrap the entire function bodies in unsafe blocks. Let me know what you prefer.

Checklist

• I have tested this change locally
• I have documented any public APIs or CLI changes
• I have added appropriate examples or comments
• The code builds and passes all checks (cargo check, cargo test)
• I have updated the changelog if applicable

[LeWimbes]

The tests seem to fail because, when creating the eCAL version auto-select system, I didn't consider that the API returns releases in the order they were released, not in SemVer order. Currently, the setup is selecting 5.13.4 instead of 6.0.0.
I'll create a separate PR to fix that.
For now, you should be able to manually run the workflow and select the correct version.

[LeWimbes]

I’ve rebased everything on main, and the workflows are passing now :)

[rex-schilasky]

@LeWimbes great! Thank you.

[Copilot]

Pull Request Overview

This PR migrates the project from Rust Edition 2021 to Rust Edition 2024 and adds Resolver Version 3. The changes ensure compatibility with Rust Edition 2024 requirements, including explicit unsafe blocks in extern "C" functions and updated import ordering to match the new edition's conventions.

• Updates all Cargo.toml files to use edition = "2024"
• Adds resolver = "3" to the workspace configuration
• Updates dependency versions (prost from 0.13 to 0.14, bindgen from 0.71 to 0.72)
• Adds explicit unsafe blocks within extern "C" functions as required by Edition 2024
• Reorders imports to match Edition 2024 conventions (alphabetical ordering)

Reviewed Changes

Copilot reviewed 33 out of 33 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
Cargo.toml	Adds resolver = "3" and fixes trailing comma
rustecal*/Cargo.toml	Updates edition to "2024" across all crates
rustecal-sys/Cargo.toml	Updates bindgen dependency from 0.71 to 0.72
rustecal-types-protobuf/Cargo.toml	Updates prost dependency from 0.13 to 0.14
person_send/Cargo.toml, person_receive/Cargo.toml	Updates prost and prost-build to 0.14
rustecal-pubsub/src/payload_writer.rs	Adds explicit unsafe blocks in extern "C" functions
Multiple import files	Reorders imports alphabetically per Edition 2024 conventions

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