Use workspaces and move everything into compiler/

compiler/parse/src/problems.rs

@@ -0,0 +1,25 @@
+use roc_region::all::Loc;
+
+pub type Problems = Vec<Loc<Problem>>;
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum Problem {
+    // UNICODE CODE POINT
+    /// TODO Invalid hex code - Unicode code points must be specified using hexadecimal characters (the numbers 0-9 and letters A-F)
+    NonHexCharsInUnicodeCodePoint,
+    /// TODO Invalid Unicode code point. It must be no more than \\u{10FFFF}.
+    UnicodeCodePointTooLarge,
+    InvalidUnicodeCodePoint,
+    MalformedEscapedUnicode,
+    NoUnicodeDigits,
+
+    // STRING LITERAL
+    NewlineInLiteral,
+    Tab,
+    CarriageReturn,
+    NullChar,
+    UnsupportedEscapedChar,
+
+    // NUMBER LITERAL
+    OutsideSupportedRange,
+}