docs: link fat.md from the architecture index

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
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Nexoniarz 2026-10-23 11:17:42 +02:00
commit f253e134b1

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@ -87,6 +87,7 @@ Read in this order if you are new:
| [syscalls.md](syscalls.md) | The one table everything is generated from, and how a musl binary runs unmodified. |
| [filesystem.md](filesystem.md) | The VFS, the buffer cache, mounts, procfs. |
| [schfs.md](schfs.md) | The copy-on-write root filesystem. |
| [fat.md](fat.md) | FAT12/16/32 with long names: USB sticks, SD cards, the ESP. |
| [devices.md](devices.md) | Buses, classes, binding, and the vtables consumers talk to. |
| [usb.md](usb.md) | xHCI, the USB core, and the three class drivers. |
| [graphics.md](graphics.md) | Framebuffer, text rendering, the console, and PSOGM. |