Page manager with buffer pool #785

Job	Run time
lint	44s
build (ubuntu-latest, dev)	1m 5s
format	20s
build (macos-latest, dev)	53s
check-cli-lockfile	38s
build (ubuntu-latest, release)	1m 53s
unit-tests (ubuntu-latest, release, mmap_backend)	1m 26s
unit-tests (macos-latest, release, mmap_backend)	1m 10s
unit-tests (macos-latest, dev, buffer_pool_backend)	2m 34s
unit-tests (ubuntu-latest, dev, mmap_backend)	3m 15s
unit-tests (ubuntu-latest, dev, buffer_pool_backend)	3m 1s
unit-tests (ubuntu-latest, release, buffer_pool_backend)	1m 15s
build (macos-latest, release)	2m 27s
integration-tests (ubuntu-latest, dev, buffer_pool_backend)	3m 21s
integration-tests (ubuntu-latest, release, mmap_backend)	3m 3s
integration-tests (macos-latest, release, buffer_pool_backend)	2m 24s
integration-tests (ubuntu-latest, release, buffer_pool_backend)	3m 15s
unit-tests (macos-latest, dev, mmap_backend)	2m 12s
unit-tests (macos-latest, release, buffer_pool_backend)	1m 15s
integration-tests (macos-latest, dev, mmap_backend)	2m 11s
integration-tests (macos-latest, dev, buffer_pool_backend)	2m 8s
integration-tests (ubuntu-latest, dev, mmap_backend)	3m 19s
integration-tests (macos-latest, release, mmap_backend)	2m 3s
	45m 52s

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