feat: Initialize compiler GUI project

Sets up the basic structure for the compiler GUI application using
eframe.
This includes the main application loop, a default UI layout with a
source code editor and an output log panel, and the foundational AST
(Abstract Syntax Tree) definitions for types, nodes, and an evaluation
mechanism.

Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "Ast"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+eframe = "0.33.3"