Add primary selection API #406

Job	Run time
build linux pkg-config	1m 17s
build vcpkg (macos-latest)	7m 51s
build bundled (macos-latest)	8m 57s
build vcpkg (ubuntu-latest)	4m 15s
build bundled (ubuntu-latest)	1m 59s
build vcpkg (windows-latest)	8m 2s
build bundled (windows-latest)	4m 32s
build bundled (--release, macos-latest)	5m 45s
build bundled (--release, ubuntu-latest)	2m 7s
build bundled (--release, windows-latest)	5m 36s
build bundled (static-link, macos-latest)	10m 5s
build bundled (static-link, ubuntu-latest)	2m 20s
build bundled (static-link, windows-latest)	4m 28s
build bundled (static-link, --release, macos-latest)	3m 39s
build bundled (static-link, --release, ubuntu-latest)	2m 11s
build bundled (static-link, --release, windows-latest)	6m 31s
	1h 19m 35s

Provide feedback