implement lightweight IOC/DI framework

- Add annotation system (@Component, @Service, @Configuration, @Bean, @Inject, @Qualifier, @Primary, @Scope, @PostConstruct, @Import, @TimiInjectApplication)
- Implement BeanContext for managing bean instances and definitions
- Implement BeanScanner for component scanning (file system and jar)
- Implement BeanFactory with constructor injection and lifecycle support
- Support @Configuration and @Bean factory methods
- Support @Qualifier and @Primary for multi-implementation
- Support @Scope (singleton/prototype)
- Support @PostConstruct lifecycle callback
- Support @Import and Module extension
- Add circular dependency detection
- Add dependency graph export
- Add demo and test cases

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/main/java/com/imyeyu/inject/annotation/Qualifier.java

@@ -0,0 +1,21 @@
+package com.imyeyu.inject.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * 按名称限定依赖注入
+ *
+ * @author 夜雨
+ */
+@Target(ElementType.PARAMETER)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Qualifier {
+
+    /**
+     * Bean 名称
+     */
+    String value();
+}