Use ParsingError enum for all errors in parser

parser/src/parser/error.rs

@@ -0,0 +1,27 @@
+use miette::Diagnostic;
+use thiserror::Error;
+
+#[derive(Error, Diagnostic, Debug)]
+pub enum ParsingError {
+    #[error(transparent)]
+    #[diagnostic(code(gen_color::io_error))]
+    IoError(#[from] std::io::Error),
+
+    #[error(
+        "Invalid syntax"
+    )]
+    #[diagnostic(code(
+        gen_color::colors_and_steps_mismatch
+    ))]
+    InvalidSyntax {
+        path: Box<str>,
+        msg: Box<str>,
+        line: u32,
+        #[source_code]
+        input: String,
+        #[help]
+        advice: String,
+        #[label("span")]
+        span: (usize, usize),
+    },
+}

parser/src/parser/mod.rs

@@ -1,6 +1,5 @@
 pub mod ast;
 pub mod error;
-mod diagnostics;
 mod expression;
 mod operator;
 pub mod parser;