CI: generalize build jobs to multiple platforms

- Add matrix strategy to build, build_wasm, build-tests, and
  build-tests-webrtc jobs
- Support ubuntu-22.04, ubuntu-24.04, ubuntu-24.04-arm, and macos-latest
- Add platform-specific dependency installation (apt vs brew)
- Update artifact names to include OS identifier to avoid conflicts
- Add documentation update reminders for platform matrix changes

This enables testing builds across multiple platforms while maintaining
the same functionality.

Author: dannywillems

.github/workflows/ci.yaml

@@ -116,6 +116,8 @@ jobs:
           make test-p2p
 
   build:
+    # NOTE: If you add or remove platforms from this matrix, make sure to update
+    # the documentation at website/docs/developers/getting-started.mdx
     strategy:
       matrix:
         os: [ubuntu-22.04, ubuntu-24.04, ubuntu-24.04-arm, macos-latest]
@@ -157,6 +159,8 @@ jobs:
           path: target/release/openmina
 
   build_wasm:
+    # NOTE: If you add or remove platforms from this matrix, make sure to update
+    # the documentation at website/docs/developers/getting-started.mdx
     strategy:
       matrix:
         os: [ubuntu-22.04, ubuntu-24.04, ubuntu-24.04-arm, macos-latest]
@@ -197,6 +201,8 @@ jobs:
           make build-wasm
 
   build-tests:
+    # NOTE: If you add or remove platforms from this matrix, make sure to update
+    # the documentation at website/docs/developers/getting-started.mdx
     strategy:
       matrix:
         os: [ubuntu-22.04, ubuntu-24.04, ubuntu-24.04-arm, macos-latest]
@@ -243,6 +249,8 @@ jobs:
           path: target/release/tests
 
   build-tests-webrtc:
+    # NOTE: If you add or remove platforms from this matrix, make sure to update
+    # the documentation at website/docs/developers/getting-started.mdx
     strategy:
       matrix:
         os: [ubuntu-22.04, ubuntu-24.04, ubuntu-24.04-arm, macos-latest]

website/docs/developers/getting-started.mdx

@@ -22,8 +22,13 @@ development environment and build OpenMina from source.
 
 ### System Requirements
 
-- **Operating System**: Ubuntu 20.04+ or Debian 11+ (other Linux distributions
-  may work but are not officially supported)
+- **Operating System**: Officially supported platforms (build tested in CI):
+  - Ubuntu 22.04 LTS
+  - Ubuntu 24.04 LTS (x86_64 and ARM64)
+  - macOS (latest)
+  - Other Linux distributions may work but are not officially supported
+  - Note: While we test compilation on all platforms, the full test suite is
+    only run on ubuntu-latest
 - **Memory**: At least 8GB RAM (16GB recommended)
 - **Storage**: At least 20GB free space
 - **Network**: Stable internet connection for downloading dependencies