feat: add molang package

1. upgrade bukkit chat
2. fix config update error

Signed-off-by: MiaoWoo <admin@yumc.pw>

packages/molang/src/parser/expressions/prefix.ts

@@ -0,0 +1,57 @@
+import { TTokenType } from '../../tokenizer/token'
+import { Expression, IExpression } from '../expression'
+
+export class PrefixExpression extends Expression {
+	type = 'PrefixExpression'
+
+	constructor(
+		protected tokenType: TTokenType,
+		protected expression: IExpression
+	) {
+		super()
+	}
+
+	get allExpressions() {
+		return [this.expression]
+	}
+	setExpressionAt(_: number, expr: IExpression) {
+		this.expression = expr
+	}
+
+	isStatic() {
+		return this.expression.isStatic()
+	}
+
+	eval() {
+		const value = this.expression.eval()
+
+		if (typeof value !== 'number')
+			throw new Error(
+				`Cannot use "${
+					this.tokenType
+				}" operator in front of ${typeof value} "${value}"`
+			)
+
+		switch (this.tokenType) {
+			case 'MINUS': {
+				return -value
+			}
+			case 'BANG': {
+				return !value
+			}
+		}
+	}
+
+	toString() {
+		switch (this.tokenType) {
+			case 'MINUS': {
+				return `-${this.expression.toString()}`
+			}
+			case 'BANG': {
+				return `!${this.expression.toString()}`
+			}
+		}
+
+		throw new Error(`Unknown prefix operator: "${this.tokenType}"`)
+	}
+}