feat: Created a theme validation macro to verify theme configurations before allowing the TUI to start

proc_macros/validate_theme_derive/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "validate_theme_derive"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+quote = "1.0.39"
+syn = "2.0.99"