runtime error handling

[csgui]

Implements #104

Runtime errors have uncovered issues that are being tracked. Some related tests are currently being ignored.

To simplify this PR review, all necessary changes to address these issues will be handled in a separate work after this PR is merged.

[codecov]

Codecov Report

Attention: Patch coverage is 90.95477% with 36 lines in your changes missing coverage. Please review.

Project coverage is 86.19%. Comparing base (54964f1) to head (c9caf89).

Files	Patch %	Lines
clar2wasm/src/error_mapping.rs	76.92%	17 Missing and 1 partial ⚠️
clar2wasm/src/tools.rs	60.86%	9 Missing ⚠️
clar2wasm/src/words/conditionals.rs	18.18%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #379      +/-   ##
==========================================
- Coverage   86.26%   86.19%   -0.08%     
==========================================
  Files          43       44       +1     
  Lines       19316    19406      +90     
  Branches    19316    19406      +90     
==========================================
+ Hits        16663    16727      +64     
- Misses       1182     1214      +32     
+ Partials     1471     1465       -6     

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[krl]

The code changes look good, some changes suggested.

Also, i have been working on converting the lib_test tests to crosscheck tests in the new style, without macros. Is it necessary to use this test method for some reason or could we convert them to the new style?

[csgui]

@krl Regarding your question about lib_tests, I see no problem in removing the macros. What is need there is the ability to validate a snippet of Clarity code.

[krl]

I think merging anything that ignores more than a few tests is not a good idea.

The reason for using anonymous errors in the first place was because they use different error enums, unifying them first would be better, if we're going this route.

[csgui]

@krl tests are not being ignored anymore. Instead, a generic error assertion is in place, which can be changed to a more specific one once compile errors are handled. (#421).

[Acaccia]

Great work here!