Add & register more basic commands

src/vm/commands/suffix.ts

@@ -0,0 +1,18 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Suffix extends Command<{ with: StrTerm }> {
+    attemptParse(context: ParseContext): { with: StrTerm } {
+        return {
+            with: context.popTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'suffix'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'suffix')
+    }
+}