docs: update readme for macos support (maplibre#44)

change opengl support for macos from "should be supported" to "not
possible", since opengl is
[deprecated](https://developer.apple.com/library/archive/documentation/GraphicsImaging/Conceptual/OpenGL-MacProgGuide/opengl_pg_concepts/opengl_pg_concepts.html)
on macos, add note on MoltenVK for arm macos

formatted with prettier

## Launch Checklist

<!-- Thanks for the PR! Feel free to add or remove items from the
checklist. -->

- [x] Confirm **your changes do not include backports from Mapbox
projects** (unless with compliant license) - if you are not sure about
this, please ask!
- [x] Briefly describe the changes in this PR.
- [ ] Link to related issues.
- [ ] Include before/after visuals or gifs if this PR includes visual
changes.
- [ ] Write tests for all new functionality.
- [ ] Document any changes to public APIs.
 - [ ] Post benchmark scores.
 - [ ] Add an entry to `CHANGELOG.md` under the `## main` section.

---------

Co-authored-by: Frank Elsinga <frank@elsinga.de>

Author: birkskyum

README.md

@@ -25,20 +25,23 @@ If no feature is specified, the crate will automatically select the platform-app
 
 ### Platform Support
 
-The following platform and backend combinations are supported and tested in CI:
+The following platform and rendering-API combinations are supported and tested in CI:
 
-| Platform  | Vulkan | OpenGL | Metal |
-|-----------|--------|--------|-------|
-| Linux x86 | ✅     | ✅     | ❌    |
-| Linux ARM | ✅     | ✅     | ❌    |
-| macOS ARM | 🟨     | 🟨     | 🟨    |
+| Platform  | Metal | Vulkan | OpenGL |
+| --------- | ----- | ------ | ------ |
+| Linux x86 | ❌    | ✅     | ✅     |
+| Linux ARM | ❌    | ✅     | ✅     |
+| macOS ARM | 🟨    | 🟨[^1] | ❌     |
 
 <sub>
 ✅ = IS supported and tested in CI
 🟨 = SHOULD be supported, but currently is not
 ❌ = Not possible
 </sub>
 
+[^1]: Vulcan support on macos is provided via MoltenVK. There is a slight performance overhead for this with little upsides. Both Metal and Vulcan run through the same extensive test suite upstream. You can use Vulcan if you find a bug in the Metal implementation until we have fixed it upstream.
+
+
 ### Apt Packages
 
 > [!NOTE]
@@ -67,17 +70,18 @@ sudo apt-get install -y mesa-vulkan-drivers glslang-dev
 
 ## Development
 
-* This project is easier to develop with [just](https://github.com/casey/just#readme), a modern alternative to `make`.
+- This project is easier to develop with [just](https://github.com/casey/just#readme), a modern alternative to `make`.
   Install it with `cargo install just`.
-* To get a list of available commands, run `just`.
-* To run tests, use `just test`.
+- To get a list of available commands, run `just`.
+- To run tests, use `just test`.
 
 ### Compiling MapLibre Native
 
 This crate relies on the MapLibre Native library, which is compiled as part of the build process:
-* if the `MLN_FROM_SOURCE` environment variable is set, the build script will compile the native library from that dir.
-* if this repo has been cloned, it will contain the `/maplibre-native` submodule, which will be used to compile the library. Make sure to run `git submodule update --init --recursive` to fetch the submodule.
-* if there is no `/maplibre-native` submodule, the build script assumes it is being run as a dependency, and will try to download the source into the `OUT_DIR`.  Note that the first might take significant time to download and compile.
+
+- if the `MLN_FROM_SOURCE` environment variable is set, the build script will compile the native library from that dir.
+- if this repo has been cloned, it will contain the `/maplibre-native` submodule, which will be used to compile the library. Make sure to run `git submodule update --init --recursive` to fetch the submodule.
+- if there is no `/maplibre-native` submodule, the build script assumes it is being run as a dependency, and will try to download the source into the `OUT_DIR`. Note that the first might take significant time to download and compile.
 
 ### MapLibre Native Dependency Management
 
@@ -93,8 +97,8 @@ Join the `#maplibre-martin` slack channel at OSMUS -- automatic invite is at <ht
 
 Licensed under either of
 
-* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or <http://www.apache.org/licenses/LICENSE-2.0>)
-* MIT license ([LICENSE-MIT](LICENSE-MIT) or <http://opensource.org/licenses/MIT>)
+- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or <http://www.apache.org/licenses/LICENSE-2.0>)
+- MIT license ([LICENSE-MIT](LICENSE-MIT) or <http://opensource.org/licenses/MIT>)
   at your option.
 
 ### Contribution