mem: combine `PageFrameAllocate` and `PageFrameFree` into `Alloc` #97

Job	Run time
build-limine-aarch64 (dev, --all-features)	59s
boot-protocol-header	54s
build-limine-aarch64 (dev, --no-default-features)	55s
build-kernel-aarch64 (dev, --all-features)	55s
build-kernel-x86_64 (dev, --all-features)	58s
build-kernel-aarch64 (dev, --no-default-features)	1m 0s
build-limine-aarch64 (release, --all-features)	54s
build-kernel-x86_64 (dev, --no-default-features)	1m 16s
build-limine-x86_64 (dev, --all-features)	1m 7s
build-kernel-aarch64 (release, --all-features)	48s
build-limine-aarch64 (release, --no-default-features)	55s
build-kernel-x86_64 (release, --all-features)	1m 2s
build-kernel-aarch64 (release, --no-default-features)	56s
build-limine-x86_64 (dev, --no-default-features)	1m 3s
build-kernel-x86_64 (release, --no-default-features)	1m 1s
build-limine-x86_64 (release, --all-features)	1m 6s
lint-clippy	1m 22s
build-limine-x86_64 (release, --no-default-features)	1m 12s
lint-docs	1m 28s
lint-python	11s
lint-rustfmt	44s
unit-test	1m 8s
	21m 54s

Provide feedback