Streamline Logic and Error Handling in `configLoad.ts`

[Mefisto04]

The code in src/config/configLoad.ts can be optimized for better efficiency. Suggested improvements include:

1. Parallelize File Checks: Execute the local and global configuration file existence checks in parallel using Promise.all to reduce execution time.

2. Refactor mergeConfigs Function: Simplify the merging logic by using helper functions and Array.prototype.flat() to avoid repetitive code.

3. Enhance Error Handling: Consolidate error handling in loadAndValidateConfig to make the code more concise and maintainable.

Implementing these changes will enhance code efficiency without affecting existing functionality.

[yamadashy]

@Mefisto04 Thank you for these suggestions. They look promising, although I'm not entirely sure about the implementation details for all of them. Let me share my thoughts on each point:

1. Regarding parallelizing file checks: If I understand correctly, this involves using Promise.all to chain the file existence checks. This seems like a straightforward optimization that could indeed save some time, especially when dealing with both local and global configuration files.

2. For refactoring the mergeConfigs function: I believe the idea is to use flat() to merge nested parts of the configuration. This could potentially simplify our code, but I'd like to see a more detailed example of how this would work in practice, especially considering the different levels of nesting in our configuration objects.

3. As for enhancing error handling: This sounds like a valuable improvement. A more consolidated and informative error handling system would certainly be helpful for debugging and maintenance. I would appreciate if you could provide a more detailed implementation for this.

Could you provide some more detailed code snippets or pseudo-code for these improvements?

Thank you again for your thoughtful suggestions.

[Mefisto04]

My initial thoughts are:

1. Parallelizing File Checks: The idea is to check for both the local and global config files at the same time using Promise.all, instead of doing them one after the other. This makes the checks faster.

2. Refactoring mergeConfigs: Use a helper function to combine arrays and flatten them, which will simplify merging configurations and avoid repeating code.

3. Improving Error Handling: Group the different error cases together and throw a clear message based on the type of error. This reduces repeated code and makes errors easier to understand.

Let me know if this approach makes sense

[Mefisto04]

@yamadashy please review this and assign this if it works fine

[yamadashy]

Thank you for your detailed suggestions and clarifications, @Mefisto04. I've gone ahead and assigned this task to you. I'm looking forward to seeing the improvements in action!