feat: Changed Render texture format to selectable

[hatayama]

Description

• Added the ability to choose the format of the internally generated rendere texture.
• This is because we wanted to create an effect using HDR Color. For example, like the post effect bloom, where the effect is applied to areas where the luminance exceeds a threshold value.

Type of change

Please write the commit message in the format corresponding to the change type.
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• New feature (non-breaking change which adds functionality)

Test environment

• Platform: [e.g. Editor(Windows/Mac), Standalone(Windows/Mac), iOS, Android, WebGL]
• Unity version: Unity 6000.0.41f1, 2021.3.51, 2019.4.40
• Build options: [URP]

Checklist

• This pull request is for merging into the develop branch
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have checked my code and corrected any misspellings

[mob-sakai]

Thank you for the PR!

[mob-sakai]

🎉 This pull request has been resolved in version 1.2.0 🎉

The release is available on GitHub release

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