cl 0.0.2: MAJOR ERGONOMIC BOOST

Broke frontend into its own library, "cl-frontend"
- Frontend is pretty :D
- Included sample fibonacci implementation

Deprecated conlang::ast::Visitor in favor of bespoke traits
- Rust traits are super cool.
- The Interpreter is currently undergoing a major rewrite

Added preliminary type-path support to the parser
- Currently incomplete: type paths must end in Never..?

Pretty printer is now even prettier
- conlang::ast now exports all relevant AST nodes, since there are no namespace collisions any more

libconlang/src/token/token_type.rs

@@ -87,6 +87,9 @@ pub enum Keyword {
     Let,
     Mut,
     Return,
+    SelfKw,
+    SelfTy,
+    Super,
     True,
     While,
 }
@@ -174,6 +177,9 @@ impl Display for Keyword {
             Self::Let => "let".fmt(f),
             Self::Mut => "mut".fmt(f),
             Self::Return => "return".fmt(f),
+            Self::SelfKw => "self".fmt(f),
+            Self::SelfTy => "Self".fmt(f),
+            Self::Super => "super".fmt(f),
             Self::True => "true".fmt(f),
             Self::While => "while".fmt(f),
         }
@@ -195,6 +201,9 @@ impl FromStr for Keyword {
             "let" => Self::Let,
             "mut" => Self::Mut,
             "return" => Self::Return,
+            "self" => Self::SelfKw,
+            "Self" => Self::SelfTy,
+            "super" => Self::Super,
             "true" => Self::True,
             "while" => Self::While,
             _ => Err(())?,