add a basic structure for disassembler + executor

Instructions added
Branch and Exchange (BX)
Branch and Link (B)
Multiply and Accumulate (MUL, MLA)
Multiply Long and Accumulate (SMULL, SMLAL, UMULL, UMLAL)
Single data swap (SWP)
[WIP] Halfword Transfer (STRH, LDRH)

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

src/meson.build

@@ -6,10 +6,13 @@ lib_sources = files(
 subdir('util')
 subdir('cpu')
 
+fmt = dependency('fmt', version : '>=10.1.0')
 lib = library(
   meson.project_name(),
   lib_sources,
-  install: true
+  dependencies: [fmt],
+  install: true,
+  cpp_args: '-DFMT_HEADER_ONLY'
 )
 
-import('pkgconfig').generate(lib)
+import('pkgconfig').generate(lib)