feat: expand constant inline for loops

source/diagnostics/diagnostics.hon

@@ -113,6 +113,7 @@ Code :: enum {
     specialization_limit
     comptime_execution_limit
     comptime_value_escape
+    inline_loop_control
     invalid_generated_field_name
     invalid_struct_layout
     invalid_c_record_field_type
@@ -250,6 +251,7 @@ messages :: $enummap.init(Code, []u8, {
     specialization_limit = "compile-time specialization exceeds its recursion or instance limit",
     comptime_execution_limit = "compile-time execution exceeds its recursion or step limit",
     comptime_value_escape = "compile-time result cannot escape evaluation as a source value",
+    inline_loop_control = "break or continue targeting an inline loop must be compile-time-resolvable",
     invalid_generated_field_name = "generated field name must be an ASCII identifier",
     invalid_struct_layout = "generated record layout must be .auto or .c; C-layout records require at least one field",
     invalid_c_record_field_type = "record field is not a supported C-layout value type",