Replace libdparse with DMD in HasPublicExampleCheck #429

Job	Run time
Run all tests (dmd-latest, dmd, ubuntu-22.04, make)	2m 40s
Run all tests (dmd-latest, dmd, ubuntu-22.04, dub, current)	1m 26s
Run all tests (dmd-latest, dmd, ubuntu-22.04, dub, min libdparse)	1m 35s
Run all tests (dmd-latest, dmd, windows-latest, make)	2m 2s
Run all tests (dmd-latest, dmd, windows-latest, dub, current)	2m 50s
Run all tests (dmd-latest, dmd, windows-latest, dub, min libdparse)	2m 39s
Run all tests (ldc-latest, ldmd2, ubuntu-22.04, make)	3m 38s
Run all tests (ldc-latest, ldmd2, ubuntu-22.04, dub, current)	1m 50s
Run all tests (ldc-latest, ldmd2, ubuntu-22.04, dub, min libdparse)	2m 3s
Run all tests (ldc-latest, ldmd2, macos-latest, make)	4m 14s
Run all tests (ldc-latest, ldmd2, macos-latest, dub, current)	2m 4s
Run all tests (ldc-latest, ldmd2, macos-latest, dub, min libdparse)	1m 45s
Run all tests (ldc-latest, ldmd2, windows-latest, make)	5m 48s
Run all tests (ldc-latest, ldmd2, windows-latest, dub, current)	3m 10s
Run all tests (ldc-latest, ldmd2, windows-latest, dub, min libdparse)	3m 30s
Run all tests (dmd-latest, gdc-12, ubuntu-22.04, make)	7m 13s
Run all tests (dmd, macos-13, dub, current)	2m 19s
	50m 46s

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