improvement: convert anyhow to thiserror errors

[Wodann]

To Do:

• rebase

[baszalmstra]

This is amazing! Thanks so much!

[codecov]

Codecov Report

Merging #521 (e83e7fc) into main (95a9612) will decrease coverage by 2.94%.
The diff coverage is 80.41%.

@@            Coverage Diff             @@
##             main     #521      +/-   ##
==========================================
- Coverage   87.16%   84.23%   -2.94%     
==========================================
  Files         274      274              
  Lines       31022    31026       +4     
==========================================
- Hits        27041    26135     -906     
- Misses       3981     4891     +910     

Impacted Files	Coverage Δ
crates/mun_memory/src/lib.rs	50.00% <0.00%> (ø)
crates/mun_memory/src/type/mod.rs	88.88% <ø> (ø)
crates/mun_runtime/src/lib.rs	75.05% <76.47%> (+0.75%)	⬆️
crates/mun_runtime/src/assembly.rs	92.33% <78.57%> (+3.44%)	⬆️
crates/mun_libloader/src/temp_library.rs	93.33% <83.33%> (-6.67%)	⬇️
crates/mun_libloader/src/lib.rs	97.95% <91.66%> (-2.05%)	⬇️
...rates/mun_codegen/src/code_gen/assembly_builder.rs	100.00% <100.00%> (ø)
crates/mun_codegen/src/code_gen/symbols/mod.rs	98.05% <100.00%> (-1.52%)	⬇️
crates/mun_test/src/driver.rs	83.47% <100.00%> (-4.14%)	⬇️

... and 9 files with indirect coverage changes