docs(amiga): complete AmigaOS 3.1/3.2 developer reference — 172 files across 17 sections

Comprehensive technical documentation covering:
- Hardware: OCS/ECS/AGA custom chip registers, Copper & Blitter deep dives
- Boot sequence: cold boot through startup-sequence
- Binary format: HUNK executable spec, relocation, debug info
- Linking & ABI: .fd files, LVO tables, register calling conventions
- Exec kernel: tasks, interrupts, memory, signals, semaphores
- AmigaDOS: file I/O, FFS/OFS layout, CLI/Shell scripting
- Graphics: planar bitmaps, Copper programming, HAM/EHB modes
- Intuition: screens, windows, IDCMP, BOOPSI
- Devices: trackdisk, SCSI, serial, timer, audio, keyboard
- Libraries: utility, expansion, IFFParse, locale, ARexx
- Networking: bsdsocket API, SANA-II, TCP/IP stack comparison
- Toolchain: GCC, vasm/vlink, SAS/C, NDK, debugging
- Reverse engineering: IDA/Ghidra setup, compiler fingerprints, case studies
- CPU & MMU: 68040/060 emulation libs, PMMU, cache management
- Driver development: SANA-II, Picasso96/RTG, AHI audio

All files include breadcrumb navigation. No local paths or proprietary content.

08_graphics/README.md

@@ -0,0 +1,21 @@
+[← Home](../README.md)
+
+# Graphics Subsystem — Overview
+
+## Section Index
+
+| File | Description |
+|---|---|
+| [gfx_base.md](gfx_base.md) | GfxBase structure and global graphics state |
+| [bitmap.md](bitmap.md) | BitMap structure, planar layout, allocation |
+| [copper.md](copper.md) | Copper coprocessor, instruction format, UCopList |
+| [blitter.md](blitter.md) | Blitter DMA engine, minterms, BltBitMap |
+| [sprites.md](sprites.md) | Hardware sprites, SimpleSprite, MoveSprite |
+| [rastport.md](rastport.md) | RastPort, drawing primitives, layers |
+| [views.md](views.md) | View, ViewPort, MakeVPort, display construction |
+| [text_fonts.md](text_fonts.md) | TextFont, TextAttr, OpenFont, Text rendering |
+| [display_modes.md](display_modes.md) | Display database, ModeID, monitor specs |
+| [ham_ehb_modes.md](ham_ehb_modes.md) | HAM6, HAM8, and EHB special display modes |
+| [animation.md](animation.md) | AnimOb, BOB, VSprite, GEL system |
+| [copper_programming.md](copper_programming.md) | Copper deep dive: architecture, examples, system API |
+| [blitter_programming.md](blitter_programming.md) | Blitter deep dive: minterms, cookie-cut, line draw |