MNI-5: Fujifilm MakerNote Parser

[rpuneet]

Summary

Implement Fujifilm MakerNote parser for Epic #9 (Phase 2).

Format Specification

• Header: "FUJIFILM" (8 bytes) + 4-byte IFD offset
• IFD Offset: Value at bytes 8-11 (usually 12)
• Byte Order: Always Little-endian
• Offset Base: Relative to MakerNote start

Priority Tags (Phase 2)

Tag	Name	Type
0x0010	SerialNumber	ASCII
0x1000	Quality	ASCII
0x1001	Sharpness	Short
0x1002	WhiteBalance	Short
0x1021	FocusMode	Short
0x1022	AFMode	Short
0x1401	FilmMode	Short (Provia, Velvia, etc.)

Acceptance Criteria

• Detects Fujifilm by "FUJIFILM" header
• Handles relative offsets to MakerNote start
• Forces Little-endian regardless of parent
• Decodes 10+ Fujifilm tags
• Unit tests with real Fujifilm samples (RAF, JPG)

Blocked by: MNI-3 (Sony)
Parent: #9

[rpuneet]

Completed in PR #33