Add linter stub

Cargo.lock

@@ -649,6 +649,10 @@ dependencies = [
  "thiserror",
 ]
 
+[[package]]
+name = "leo-linter"
+version = "0.1.0"
+
 [[package]]
 name = "leo-types"
 version = "0.1.0"

Cargo.toml

@@ -13,7 +13,7 @@ name = "leo"
 path = "leo/main.rs"
 
 [workspace]
-members = [ "ast", "compiler", "gadgets", "leo-inputs", "types" ]
+members = [ "ast", "compiler", "gadgets", "leo-inputs", "linter", "types" ]
 
 [dependencies]
 leo-compiler = { path = "compiler", version = "0.1.0" }

linter/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "leo-linter"
+version = "0.1.0"
+authors = ["The Aleo Team <hello@aleo.org>"]
+edition = "2018"
+
+[dependencies]

linter/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}