Add & register more basic commands

src/vm/commands/indent.ts

@@ -0,0 +1,24 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export type IndentData = {
+    type: 'space'|'tab',
+    level?: StrTerm,
+}
+
+export class Indent extends Command<IndentData> {
+    attemptParse(context: ParseContext): IndentData {
+        return {
+            type: context.popKeywordInSet(['space', 'tab']).value,
+            level: context.popOptionalTerm(),
+        }
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'indent')
+    }
+
+    getDisplayName(): string {
+        return 'indent'
+    }
+}