Add build modes and dev hooks, improve injection and docs

Introduces build mode options (rmfakecloud, qmldiff, dev, all) to CMake and build scripts, enabling selective compilation of hooks for cloud redirection, Qt resource hooking, and reverse engineering. Adds new hooks and memory logging for dev mode, updates injection script to handle libzstd.1.dylib dependency, and documents build modes in README.

README.md

@@ -37,6 +37,7 @@ Use the provided injection script:
 
 This script will:
 - Copy the dylib to the app bundle's Resources folder
+- Copy the `libzstd.1.dylib` dependency and fix library references
 - Inject the load command into the executable using `optool`
 - Remove the code signature and resign with ad-hoc signature
 - Remove the `_MASReceipt` folder
@@ -145,5 +146,24 @@ cd RMHook
 
 2. **Compile the dylib:**
 ```bash
-./scripts/build.sh
+./scripts/build.sh [mode]
+```
+
+### Build modes
+
+The build script supports different modes for various use cases:
+
+| Mode | Description |
+|------|-------------|
+| `rmfakecloud` | Redirect reMarkable cloud to rmfakecloud server (default) |
+| `qmldiff` | Qt resource data registration hooking (WIP) |
+| `dev` | Development/reverse engineering mode with all hooks |
+| `all` | Enable all modes |
+
+Examples:
+```bash
+./scripts/build.sh              # Build with rmfakecloud mode (default)
+./scripts/build.sh rmfakecloud  # Explicitly build rmfakecloud mode
+./scripts/build.sh dev          # Build with dev/reverse engineering hooks
+./scripts/build.sh all          # Build with all modes enabled
 ```