Multiple Annotations Test - Issue #6680 Fix

Testing: Multiple stereotypes/annotations should now render correctly using external and inline annotation methods.

Baseline - no annotations

classDiagram
    class Shape
    class Circle
    class Triangle

#0 Baseline - single annotation

classDiagram
    class Shape
    class Circle
    class Triangle

    <<injected>> Shape

Method 1: External/Next-line Annotations

External annotations defined on the line after the class definition:

    classDiagram
        class Shape
        <<interface>> <<injected>> Shape
        class Circle
        <<abstract>> <<serializable>> Circle
        class Triangle
        <<interface>> <<cached>> <<singleton>> Triangle

Method 2: Inline Annotations

Inline annotations defined directly with the class definition:

    classDiagram
        class Shape <<interface>> <<injected>>
        class Circle <<abstract>> <<serializable>>
        class Square <<service>> <<singleton>> <<cached>>
        class Triangle <<interface>> <<component>> <<transient>>

Method 3: Mixed Methods Test

Combination of both external and inline annotation methods:

    classDiagram
        class Component <<interface>> <<injected>>
        class Service
        <<abstract>> <<singleton>> Service
        class Repository <<dao>> <<cached>>
        class Controller
        <<rest>> <<secured>> Controller

Real-world Example

A practical example with relationships and multiple annotations:

    classDiagram
        class BaseService <<abstract>> <<injectable>>
        class UserService <<service>> <<singleton>>
        class UserRepository <<repository>> <<cached>>
        class UserController
        <<controller>> <<secured>> UserController
        
        BaseService <|-- UserService
        UserService --> UserRepository
        UserController --> UserService