Detailed description
Historically the BMD firmware platform for the native Black Magic Probe was just referred to as native. With upcoming changes, disambiguation is required between versions of the Black Magic Probe hardware to prevent confusion. This PR renames the native platforms to bmp-v2 to reflect that they're representative of the v2 hardware. This also adds a set of bmp-v1 cross-files that copy the bmp-v2 cross-files to make it more apparent to developers that bmp-v1 support is present via bmp-v2 backwards-compatibility.
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## Detailed description
Historically the BMD firmware platform for the native Black Magic Probe was just referred to as `native`. With upcoming changes, disambiguation is required between versions of the Black Magic Probe hardware to prevent confusion. This PR renames the `native` platforms to `bmp-v2` to reflect that they're representative of the v2 hardware. This also adds a set of `bmp-v1` cross-files that copy the `bmp-v2` cross-files to make it more apparent to developers that `bmp-v1` support is present via `bmp-v2` backwards-compatibility.
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## Your checklist for this pull request
* [x] I've read the [Code of Conduct](https://codeberg.org/blackmagic-debug/blackmagic/src/CODE_OF_CONDUCT.md)
* [x] I've read the [guidelines for contributing](https://codeberg.org/blackmagic-debug/blackmagic/src/CONTRIBUTING.md) to this repository
* [x] It builds for hardware native (see [Building the firmware](https://codeberg.org/blackmagic-debug/blackmagic?tab=readme-ov-file#building-the-firmware))
* [ ] It builds as BMDA (see [Building the BMDA](https://codeberg.org/blackmagic-debug/blackmagic?tab=readme-ov-file#building-black-magic-debug-app))
* [x] I've tested it to the best of my ability
* [x] My commit messages provide a useful short description of what the commits do
## Closing issues
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