Add basic README for deucalion client

deucalion-client/README.md

@@ -1,3 +1,33 @@
 # Deucalion Client
 
-An implementation of a Deucalion client that is used to validate Deucalion.
+An implementation of a Deucalion client that is used to validate Deucalion.
+
+## Usage
+
+### Simple Injection
+```bash
+cargo run --bin deucalion_client -- path/to/deucalion.dll
+# or
+deucalion_client path/to/deucalion.dll
+```
+
+### Injection into Notepad
+```bash
+deucalion_client path/to/deucalion.dll -t notepad.exe
+```
+
+### Force Injection
+
+This calls LoadLibrary again on the same module.
+
+```bash
+deucalion_client path/to/deucalion.dll -f
+```
+
+### Force ejection
+
+**If Deucalion is still running, it may crash the game**
+
+```bash
+deucalion_client deucalion-1.0.0.dll -e
+```