rom: Macro-ify the command-tables for scripting VMs

include/data/scripts/cmd_table.h

@@ -0,0 +1,29 @@
+#ifndef POKEPLATINUM_DATA_SCRIPTS_CMD_TABLE_H
+#define POKEPLATINUM_DATA_SCRIPTS_CMD_TABLE_H
+
+// clang-format off
+
+#if defined(__ASSEMBLER__) && __ASSEMBLER__
+    .macro inc x:req
+        .set \x, \x + 1
+    .endm
+
+    .macro enum_start x=0
+        .set __enum__, \x
+    .endm
+
+    .macro enum constant:req
+        .equiv \constant, __enum__
+        inc __enum__
+    .endm
+
+    enum_start
+
+#define ScriptCommand(constant, function) enum constant
+#else
+#define ScriptCommand(constant, function) function,
+#endif
+
+// clang-format on
+
+#endif // POKEPLATINUM_DATA_SCRIPTS_CMD_TABLE_H