add README

README.md

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+# VMRCLI Command Line Utility
+
+## `Tested against`
+
+- Basic 1.1.1.1
+- Banana 2.1.1.1
+- Potato 3.1.1.1
+
+## `Requirements`
+
+- [Voicemeeter](https://voicemeeter.com/)
+
+## `Use`
+
+`./vmrcli.exe [-i] [-k] [-D] <api commands>`
+
+Where:
+
+- `i`: Enable interactive mode. If set any api commands passed will be ignored.
+- `k`: The kind of Voicemeeter (basic, banana or potato). Use this to launch the GUI.
+- `D`: Set log level 0=TRACE, 1=DEBUG, 2=INFO, 3=WARN, 4=ERROR, 5=FATAL
+
+## `Script files`
+
+Scripts can be loaded from text files, for example:
+
+```powershell
+./vbantxt-cli $(Get-Content .\example_commands.txt)
+```