Refactor Source/Effects/FsFlare Source Code

[google-labs-jules]

This commit refactors the C++ source code in the Source/Effects/FsFlare directory.

The following changes were applied to all .cpp and .h files:

• Removed unnecessary separator and version history comments.
• Translated all Japanese comments to English.
• Unified header include guards to use #pragma once.
• Wrapped #include blocks with // clang-format off and // clang-format on to prevent reordering.

Additionally, the .clang-format-ignore file was updated to allow clang-format to run on this directory, and the tool was subsequently applied to ensure consistent code style.