feat(psl): enclose recommended type in quotes

Closes #15174

psl/diagnostics/src/error.rs

@@ -295,7 +295,7 @@ impl DatamodelError {
 
     pub fn new_type_for_case_not_found_error(type_name: &str, suggestion: &str, span: Span) -> DatamodelError {
         let msg = format!(
-            "Type \"{type_name}\" is neither a built-in type, nor refers to another model, custom type, or enum. Did you mean {suggestion}?"
+            "Type \"{type_name}\" is neither a built-in type, nor refers to another model, custom type, or enum. Did you mean \"{suggestion}\"?"
         );
         Self::new(msg, span)
     }

psl/psl/tests/base/basic.rs

@@ -269,7 +269,7 @@ fn must_return_good_error_message_for_type_match() {
     let error = parse_unwrap_err(dml);
 
     let expected = expect![[r#"
-        [1;91merror[0m: [1mType "datetime" is neither a built-in type, nor refers to another model, custom type, or enum. Did you mean DateTime?[0m
+        [1;91merror[0m: [1mType "datetime" is neither a built-in type, nor refers to another model, custom type, or enum. Did you mean "DateTime"?[0m
           -->  schema.prisma:5
            | 
          4 | model B {
@@ -281,7 +281,7 @@ fn must_return_good_error_message_for_type_match() {
          5 |   a  datetime
          6 |   b  footime
            | 
-        [1;91merror[0m: [1mType "user" is neither a built-in type, nor refers to another model, custom type, or enum. Did you mean User?[0m
+        [1;91merror[0m: [1mType "user" is neither a built-in type, nor refers to another model, custom type, or enum. Did you mean "User"?[0m
           -->  schema.prisma:7
            | 
          6 |   b  footime