feat: improve error types and messages by using thiserror

[colifran]

This PR introduces an improved mechanism for defining error types and associated error messages throughout the source code via the thiserror crate.

Previously, a single error named TransmuteError was defined. This error was implemented manually by implementing TransmuteError, From for TransmuteError, and Display for TransmuteError. TransmuteError was all encompassing for any transmutation related errors such as resource translation errors, parsing errors, import instruction errors, etc. Additionally, any use of the panic!, unimplemented!, or unreachable! macro will result in an error message that says "unreachable" in wasm assemblies.

In general, our current mechanism for defining error types and messages causes several problems:

1. Our code is harder to debug since error types are all encompassing and too widely scoped
2. Error messages are too generic when they originate from the panic!, unimplemented!, or unreachable! macros
3. New custom error types must be implemented manually which slows down development speed and is error prone
4. Users don't have clear error messages that help them to effectively debug resulting in a frustrating UX and increasing issues in our queue

Using the thiserror crate will eliminate these problems by allowing us to quickly define new error types that can be appropriately scoped by simply adding to the Error enum. The manual work of implementing new custom error types will be handled by the thiserror crate. Additionally, we can migrate away from the panic!, unimplemented!, or unreachable! macros to provide a better UX with improved error details.

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In addition to the changes outlined above, this PR fixes 5 bugs found:

1. The python synthesizer was using ! instead of not for Condition::Not
2. The csharp synthesizer was using ! applied to the first operand for Condition::Not rather than applying ! to the entire statement wrapped in parentheses. This produces an error because ! is only valid for booleans, but applying ! to the first operand will result in instances where ! is applied to a string or number
3. The python synthesizer was not converting operands to snake case for Condition::And
4. The python synthesizer was not converting Condition::Not values to snake case
5. The csharp synthesizer was using single quotes for strings to be split instead of double quotes which causes an error because it was expecting a single character

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This PR refactored several areas in the csharp synthesizer that were not testable. The first area is the ResourceIr::Object arm when matching against ResourceIr. This branch had the same error case in multiple branches when matching against the ResourceIr::Object structure. As a result, only the first error could be tested for. A more correct implementation would be to factor this invalid structure out into a single arm that will throw an error if encountered.

Additionally, ConditionIr was implementing CsharpEmitter; however, this is no longer correct because ConditionIr does not throw any errors. This meant that the error case in each ConditionIr branch was unable to be tested.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov]

Codecov Report

Merging #600 (04e1ce5) into main (8b47ab3) will increase coverage by 4.2%.
Report is 1 commits behind head on main.
The diff coverage is 79.1%.

❗ Current head 04e1ce5 differs from pull request most recent head 41900cb. Consider uploading reports for the commit 41900cb to get more accurate results

Additional details and impacted files

Components	Coverage Δ
Parser	78.2% <ø> (ø)
Intermediate Representation	90.6% <100.0%> (+8.1%)	⬆️
Synthesizers	92.0% <74.9%> (+4.2%)	⬆️
Other	30.2% <16.7%> (-5.8%)	⬇️

@@           Coverage Diff           @@
##            main    #600     +/-   ##
=======================================
+ Coverage   82.1%   86.3%   +4.2%     
=======================================
  Files         27      27             
  Lines       5097    5212    +115     
  Branches    5097    5212    +115     
=======================================
+ Hits        4186    4499    +313     
+ Misses       741     468    -273     
- Partials     170     245     +75     

Files	Coverage Δ
src/errors/mod.rs	100.0% <100.0%> (ø)
src/ir/constructor/mod.rs	100.0% <ø> (+4.0%)	⬆️
src/ir/importer/mod.rs	100.0% <100.0%> (+8.1%)	⬆️
src/ir/mod.rs	94.2% <100.0%> (ø)
src/ir/outputs/mod.rs	90.0% <100.0%> (ø)
src/ir/resources/mod.rs	90.7% <100.0%> (+9.2%)	⬆️
src/ir/sub/mod.rs	95.5% <100.0%> (+4.3%)	⬆️
src/lib.rs	93.8% <ø> (ø)
src/synthesizer/mod.rs	100.0% <100.0%> (ø)
src/synthesizer/python/mod.rs	93.2% <90.9%> (+3.9%)	⬆️
... and 5 more

... and 2 files with indirect coverage changes

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