🐠 Add Mirror/Flip Support

[cengiz-pz]

Is there an existing issue for this?

• I have searched the existing open and closed issues
• I have searched the discussions
• I have starred the repository

Current Behavior

No response

Proposed Behavior

Add mirror_horizontal & mirror_vertical options to FeedRequest

• Pure post-processing like rotation
• Add alongside the existing rotateRGBA / rotateGray helpers on both platforms
• Especially useful for front-facing cameras that appear mirrored

Alternative Solutions

No response

Plugin Version

1.1

Anything else?

No response