Case insensitive checks

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Shader types, so only invalidate specific shader type (e.g,. Lighting)

https://github.com/doodlum/skyrim-community-shaders/blob/056d064e2c7291f1b81d60747683b85555fd8440/src/ShaderCache.cpp#L1902-L1903

			GetHumanTime(GetEta() + totalMs));
	}

	void UpdateListener::UpdateCache(const std::filesystem::path& filePath, SIE::ShaderCache& cache, bool& clearCache, bool& fileDone)
	{
		std::string extension = filePath.extension().string();
		std::string parentDir = filePath.parent_path().string();
		std::string shaderTypeString = filePath.stem().string();
		std::chrono::time_point<std::chrono::system_clock> modifiedTime{};
		auto shaderType = magic_enum::enum_cast<RE::BSShader::Type>(shaderTypeString, magic_enum::case_insensitive);
		fileDone = true;
		if (std::filesystem::exists(filePath))
			modifiedTime = std::chrono::clock_cast<std::chrono::system_clock>(std::filesystem::last_write_time(filePath));
		else  // if file doesn't exist, don't do anything
			return;
		if (!std::filesystem::is_directory(filePath) && extension.starts_with(".hlsl") && parentDir.ends_with("Shaders") && shaderType.has_value()) {  // TODO: Case insensitive checks
			// Shader types, so only invalidate specific shader type (e.g,. Lighting)
			cache.InsertModifiedShaderMap(shaderTypeString, modifiedTime);
			cache.Clear(shaderType.value());
		} else if (!std::filesystem::is_directory(filePath) && extension.starts_with(".hlsl")) {  // TODO: Case insensitive checks
			// all other shaders, since we don't know what is using it, clear everything
			clearCache = true;
		}
		fileDone = false;
	}

	void UpdateListener::processQueue()
	{
		SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_BELOW_NORMAL);