refactor(generator): 重构代码生成配置

Closes #42

continew-admin-generator/src/main/resources/templates/Entity.ftl

@@ -0,0 +1,38 @@
+package ${packageName}.${subPackageName};
+
+import java.io.Serial;
+<#if hasLocalDateTime>
+import java.time.LocalDateTime;
+</#if>
+<#if hasBigDecimal>
+import java.math.BigDecimal;
+</#if>
+
+import lombok.Data;
+
+import com.baomidou.mybatisplus.annotation.TableName;
+
+import top.charles7c.continew.starter.extension.crud.model.entity.BaseDO;
+
+/**
+ * ${businessName}实体
+ *
+ * @author ${author}
+ * @since ${date}
+ */
+@Data
+@TableName("${tableName}")
+public class ${className} extends BaseDO {
+
+    @Serial
+    private static final long serialVersionUID = 1L;
+<#if fieldConfigs??>
+  <#list fieldConfigs as fieldConfig>
+
+    /**
+     * ${fieldConfig.comment}
+     */
+    private ${fieldConfig.fieldType} ${fieldConfig.fieldName};
+  </#list>
+</#if>
+}