c#: Mechanical refactors (#1110)

* Rename generators for clarity

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

* Move interface generator to own module

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

* Move function generator to own module

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

* Move Ident code to own file

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

* Move World generator code to own file

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

* Add some comments and alittle clean up

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

---------

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

Author: jsturtevant

crates/csharp/src/csharp_ident.rs

@@ -0,0 +1,110 @@
+use heck::{ToLowerCamelCase, ToUpperCamelCase};
+
+pub(crate) trait ToCSharpIdent: ToOwned {
+    fn csharp_keywords() -> Vec<&'static str>;
+    fn to_csharp_ident(&self) -> Self::Owned;
+    fn to_csharp_ident_upper(&self) -> Self::Owned;
+}
+
+impl ToCSharpIdent for str {
+    // Source: https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/
+    fn csharp_keywords() -> Vec<&'static str> {
+        vec![
+            "abstract",
+            "as",
+            "base",
+            "bool",
+            "break",
+            "byte",
+            "case",
+            "catch",
+            "char",
+            "checked",
+            "class",
+            "const",
+            "continue",
+            "decimal",
+            "default",
+            "delegate",
+            "do",
+            "double",
+            "else",
+            "enum",
+            "event",
+            "explicit",
+            "extern",
+            "false",
+            "finally",
+            "fixed",
+            "float",
+            "for",
+            "foreach",
+            "goto",
+            "if",
+            "implicit",
+            "in",
+            "int",
+            "interface",
+            "internal",
+            "is",
+            "lock",
+            "long",
+            "namespace",
+            "new",
+            "null",
+            "object",
+            "operator",
+            "out",
+            "override",
+            "params",
+            "private",
+            "protected",
+            "public",
+            "readonly",
+            "ref",
+            "return",
+            "sbyte",
+            "sealed",
+            "short",
+            "sizeof",
+            "stackalloc",
+            "static",
+            "string",
+            "struct",
+            "switch",
+            "this",
+            "throw",
+            "true",
+            "try",
+            "typeof",
+            "uint",
+            "ulong",
+            "unchecked",
+            "unsafe",
+            "ushort",
+            "using",
+            "virtual",
+            "void",
+            "volatile",
+            "while",
+        ]
+    }
+
+    fn to_csharp_ident(&self) -> String {
+        // Escape C# keywords
+        if Self::csharp_keywords().contains(&self) {
+            format!("@{}", self)
+        } else {
+            self.to_lower_camel_case()
+        }
+    }
+
+    fn to_csharp_ident_upper(&self) -> String {
+        // Escape C# keywords
+        if Self::csharp_keywords().contains(&self) {
+            format!("@{}", self)
+        } else {
+            self.to_upper_camel_case()
+        }
+    }
+}