Add license text

Signed-off-by: Marcel Müller <neikos@neikos.email>

crates/tytix-core/Cargo.toml

@@ -5,10 +5,8 @@ edition.workspace = true
 authors.workspace = true
 
 description = "A clear and simple to use actor framework"
-repository = "https://github.com/TheNeikos/tytix"
-license = "EUPL-1.2"
-keywords = []
-categories = []
+repository.workspace = true
+license.workspace = true
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html