Add macos 15 to CI

Author: rikkimax

.github/workflows/main.yml

@@ -65,6 +65,12 @@ jobs:
           - job_name: macOS 14 x64, DMD (bootstrap)
             os: macos-14
             host_dmd: dmd-2.107.1
+          - job_name: macOS 15 intel x64, DMD (bootstrap)
+            os: macos-15-intel
+            host_dmd: dmd-2.111.0
+          - job_name: macOS 15 intel x64, LDC (bootstrap)
+            os: macos-15-intel
+            host_dmd: ldc-1.41.0
           # Windows
           - job_name: Windows x64, LDC
             os: windows-2022