Fix building kernel

[pixelherodev]

• Fix building the kernel
  • Else within false conditional results in incorrect evaluation
  • Fix edge cases in macro support
  • Relative label support
    • Backwards relative labels
  • exec directive, or alternative
    • [WIP] Fix building with scas kernel#195
  • Fix undefinitions
  • Add support for %bbbbb binary form
  • Implement .echo
    • Actually print out echoed information instead of discarding it
  • Fix local label translation
  • Forwards lookup of local labels within .dw
  • Expose equates to linker
  • Symbol files
  • Listing files? Not needed for 1.0 release.
  • Get page 0 building
    • Byte-wise comparison of output against sass'
  • Get page 1 building
    • Byte-wise comparison of output against sass'
  • Get page 2 building
    • Byte-wise comparison of output against sass'
  • Get page boot building
  • Get page priviledged building
• Add CI to ensure no new leaks or compiler warnings are added
• Fix all memory leaks when assembling kernel
  • Fix all memory leaks when building 00.bin
  • Fix all memory errors when building 00.bin
  • Fix all memory leaks when building 01.bin
  • Fix all memory errors when building 01.bin
  • Fix all memory leaks when building 02.bin
  • Fix all memory errors when building 02.bin
  • Fix all memory leaks when building boot page
  • Fix all memory errors when building boot page
  • Fix all memory leaks when building privledged page
  • Fix all memory errors when building priviledged page
• Fix all compiler warnings
• Testing