Add support for parsing hardware addresses in body

[ghaith]

Hardware Addresses (%IX1.1) can now be parsed as expressions
They get the correct type assigned to them, but the code generator will simply give them the value of 0 for now.
Fixes #621

[codecov-commenter]

Codecov Report

Base: 93.79% // Head: 93.80% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (2e87b4c) compared to base (d125ca4).
Patch coverage: 87.09% of modified lines in pull request are covered.

❗ Current head 2e87b4c differs from pull request most recent head 108f0e2. Consider uploading reports for the commit 108f0e2 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #651   +/-   ##
=======================================
  Coverage   93.79%   93.80%           
=======================================
  Files          46       46           
  Lines       17698    17706    +8     
=======================================
+ Hits        16600    16609    +9     
+ Misses       1098     1097    -1     

Impacted Files	Coverage Δ
src/ast.rs	94.61% <ø> (+0.12%)	⬆️
src/parser.rs	96.85% <79.41%> (+0.12%)	⬆️
src/resolver.rs	97.55% <95.83%> (-0.01%)	⬇️
src/codegen/generators/expression_generator.rs	88.84% <100.00%> (+<0.01%)	⬆️
src/lexer.rs	97.56% <100.00%> (+<0.01%)	⬆️
src/parser/expressions_parser.rs	93.82% <100.00%> (-0.12%)	⬇️

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[riederm]

👍