Cleanup Texture2DConverter and fix typos in pyproject.toml

[isHarryh]

Summary

This PR does some minor changes to Texture2DConverter.

• platform_blob can be List[int] in newer version of Unity, instead of only bytes.
• One platform_blob type hint still uses bytes, now corrected to List[int].
• if TYPE_CHECKING: assert xxx is not None seems redundant, now removed if.
• Pre-converts platform to BuildTarget enum.
• Wraps swizzle texture_format conversion into TextureSwizzler.
• Simplifies the redundant if-statements in image_to_texture2d.
• Optimizes docstrings and typos.

Along with two typo fixes in the pyproject.toml:

• Fixes the invalid license field in pyproject.toml which causes CodeQL failing.
• Fixes the typo of the keyword data-minig in pyproject.toml.

[K0lb3]

Sorry that I'm only replying now.

I will be blunt, I don't really see the point of this PR.

The typo fixes, doc string adjustments and the BC format collapsing are okay, but that's it.

TextureSwizzler.get_corrected_texture_format is basically a one-time use function,
which only adds a layer of indirection without any benefit, as at one of the two places where it's being used, the same check has to be done again anyway.

TextureSwizzler.PlatformBlobType is also not really useful.
The usage of bytes from before was actually wrong, as the platformblob type is defined by the Texture2D field of it, so just List[int] is enough.

The platform type also doesn't have to be narrowed down to BuildTarget,
as the only use of platform is in an equality check, which works just fine with an int as well.

[isHarryh]

Apologies - I didn’t fully considered the current needs, so I’ve decided to go ahead and revert the 3 changes you mentioned, to narrow the PR to only typo fixes.

My initial intention with these changes was to centralize the logic and make the code more readable in the long run. But I understand that, the added abstraction doesn’t bring enough value and instead introduces unnecessary complexity.

Thanks again for your constructive feedback - it’s much appreciated.

[isHarryh]

This PR now contains:

1. Typo and docstring adjustments.
2. BC format if-statements collapsing.

with some new changes:

3. One platform_blob type hint still uses bytes, now corrected to List[int].
4. if TYPE_CHECKING: assert xxx is not None seems redundant, now removed if.
5. Fixes the invalid license field in pyproject.toml which causes CodeQL failing.
6. Fixes the typo of the keyword data-minig in pyproject.toml.