Add ElfLoadAlignmentModifier

[whyitfor]

• I have reviewed the OFRAK contributor guide and attest that this pull request is in accordance with it.

One sentence summary of this PR (This should go in the CHANGELOG!)
Add ElfLoadAlignmentModifier, which reclaims unused alignment bytes between PT_LOAD segments in ELFs as free space.

Please describe the changes in your request.
Add the ElfLoadAlignmentModifier, a free space creation technique that adds unused alignment bytes between PT_LOAD segments in ELF binaries to the segments, creating free space without increasing the ELF binary footprint.
The modifier's file has example usage with an experimental CLI interface:

% python3 ofrak/core/elf/load_alignment_modifier.py --file test_ofrak/components/assets/elf/hello_elf_exec -o hello_elf_exec_freed
[+] Free space found by ElfLoadAlignmentFreeSpaceModifier: Allocatable(free_space_ranges={<MemoryPermissions.R: 4>: [Range(0x400438, 0x401000), Range(0x402128, 0x402e10)], <MemoryPermissions.RX: 5>: [Range(0x4011cd, 0x402000)]})
[+] MemoryPermissions.R free space: 0x18b0 bytes
[+] MemoryPermissions.RX free space: 0xe33 bytes
[+] Output file written to hello_elf_exec_freed
It took 0.025 seconds to run the OFRAK script