add README

README.md

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+# Cpp2Beef
+Cpp2Beef is a library for writing high quality beef bindings for C and C-Style C++. Cpp2Beef does the heavy lifting so you can focus on the library specific stuff.
+
+You can find bindings generated by Cpp2Beef at https://git.unicon-gmbh.de/BeefBindings.
+
+## Usage
+1. Create a `Setup` workspace and add Cpp2Beef from remote (`https://git.unicon-gmbh.de/Rune/Cpp2Beef.git`)
+2. Add Cpp2Beef as a dependency
+3. Write your generator
+```beef
+class ExampleGenerator : Cpp2BeefGenerator, this(Span<char8*> args)
+{
+	protected override Span<char8*> Args => args;
+	protected override Flags Flags => .None;
+
+	// You can have your binding in one file or in multiple, file management is up to you
+	StreamWriter writer = new .()..Create("../src/Example.bf")..Write("""
+		// This file was generated by Cpp2Beef
+
+		using System;
+		using System.Interop;
+
+		namespace Example;
+
+
+		""") ~ delete _;
+
+	protected override StreamWriter GetWriterForHeader(StringView header)
+	{
+        // Here you define the target file to which a cursor should be written
+        // Returning null skips the cursor
+		if (header.EndsWith("example.h"))
+			return writer;
+		return null;
+	}
+
+	protected override Block GetCursorBlock(CXCursor cursor)
+	{
+        // Optional. This can be used put cursors in custom blocks
+        // This is useful if you want all your functions to be a static class
+		if (cursor.kind == .FunctionDecl)
+			return .CustomBlock("Example");
+		return base.GetCursorBlock(cursor);
+	}
+
+	protected override void HandleCursor(CXCursor cursor)
+	{
+		// Optional. Can be used to write custom logic, how a cursor should be written
+		// If your going for this I'd recommend looking at examples in BeefBindings
+		base.HandleCursor(cursor);
+	}
+
+	protected override void WriteCustomAttributes(CXCursor cursor)
+	{
+		// Optional.
+		base.WriteCustomAttributes(cursor);
+	}
+
+	protected override void GetNameInBindings(LibClang.CXCursor cursor, String outString)
+	{
+		// Optional but you pretty much want to always override this.
+		// Allows you to change the name of cursors
+        base.GetNameInBindings(cursor, outString);
+	}
+	
+	// There are functions you can override, but these are the most common
+}
+```