feat: support all nova canvas image action, support cost display

[zhu-xiaowei]

Description

1. support nova canvas image variation, remove object, replace object, remove background and color guide generation.
2. support cost reference based on us region.

General Checklist

• The code changes have been fully tested
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of the least privilege, etc.)
• Documentation update for the change if required
• PR title conforms to conventional commit style
• If breaking change, documentation/changelog update with migration instructions

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