Document BOTW 4K HD Texture Pack v1.1 details

Added compatibility notes and installation instructions for the BOTW 4K HD Texture Pack v1.1.

docs/BOTW-4K-Texture-Pack.md

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+## BOTW 4K HD Texture Pack (v1.1) — Compatibility Notes
+
+**Pack:** The Legend of Zelda: Breath of the Wild — 4k Texture Pack **v1.1**
+(HDPacks.com, ~17.7 GiB — full terrain + vegetation overhaul vs v1.0)
+
+### Requirements
+- Game update **1.6.0** (DLC optional, recommended)
+- Switch `prod.keys` + firmware
+- Emulator with **8 GB extended DRAM**
+
+### Critical setting — REQUIRED
+Without this, the game crashes on loading screens (including **shrine entry**):
+- **Ryujinx:** Options → Settings → System → **Use alternative memory layout**
+- **Yuzu:** Emulation → Configure → System → **Unsafe extended memory layout (8GB DRAM)**
+
+### Install
+1. Extract the `4kTextures` folder into the game's mod directory:
+   `…\Ryujinx\mods\contents\01007EF00011E000\4kTextures`
+   (the `4kTextures` folder goes directly there — no extra nested folder)
+2. Remove any older version (e.g. v1.0). v1.1 **replaces** it — do not stack both.
+
+### Notes
+- The full 17.7 GiB download already bundles all bug-fix patches up to **2024-12-18**.
+  The separate 310 MiB "Patch Only" is for people who grabbed v1.1 *before* that date —
+  it strips a bad Resource Size Table (RSTB) that crashed the loading screen on stock 8 GB Ryujinx.
+- The author states v1.1 was "minimally tested" at release.
+
+### Verified
+- Emulator: Ryujinx Roofer Edition v1.1.2
+- Game update: 1.6.0
+- Shrine / loading-screen transition: no crash
+- FPS: 80–90