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.

11_libraries/locale.md

@@ -0,0 +1,46 @@
+[← Home](../README.md) · [Libraries](README.md)
+
+# locale.library — Internationalisation
+
+## Overview
+
+`locale.library` (OS 2.1+) provides language-aware string lookup, date/number formatting, and character classification for internationalised applications.
+
+---
+
+## Core Pattern
+
+```c
+struct Library *LocaleBase = OpenLibrary("locale.library", 38);
+struct Catalog *cat = OpenCatalog(NULL, "myapp.catalog",
+                                  OC_BuiltInLanguage, "english",
+                                  TAG_DONE);
+
+/* Get localised string: */
+STRPTR str = GetCatalogStr(cat, MSG_HELLO, "Hello");  /* fallback */
+
+CloseCatalog(cat);
+CloseLibrary(LocaleBase);
+```
+
+---
+
+## Locale-Aware Formatting
+
+```c
+struct Locale *loc = OpenLocale(NULL);  /* user's default */
+
+/* Format a date: */
+FormatDate(loc, "%A %e %B %Y", &datestamp, &hook);
+
+/* Format a number: */
+/* Uses loc->loc_GroupSeparator, loc->loc_DecimalPoint */
+
+CloseLocale(loc);
+```
+
+---
+
+## References
+
+- NDK39: `libraries/locale.h`