[Add][Moved] 调整Converter包路径, 增加StringToStringConverter;

[Moved] Converter, StringConverter 调整包路径;
[Add] StringToStringConverter 添加简易StringConverter实现;
[Change] CacheStoreFactory 适配更改;

ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/CacheStoreFactory.java

@@ -17,6 +17,8 @@
 
 package net.lamgc.cgj.bot.cache;
 
+import net.lamgc.cgj.bot.cache.convert.StringConverter;
+
 /**
  * 缓存存储容器构造工厂.
  * 可支持不同实现缓存存储容器.

ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/convert/Converter.java

@@ -15,7 +15,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package net.lamgc.cgj.bot.cache;
+package net.lamgc.cgj.bot.cache.convert;
 
 /**
  * 转换器接口

ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/convert/StringConverter.java

@@ -15,7 +15,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package net.lamgc.cgj.bot.cache;
+package net.lamgc.cgj.bot.cache.convert;
 
 /**
  * 某类型到字符串的转换器接口.

ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/convert/StringToStringConverter.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2020  LamGC
+ *
+ * ContentGrabbingJi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * ContentGrabbingJi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.lamgc.cgj.bot.cache.convert;
+
+/**
+ * 字符串原样转换的转换器.
+ * 不进行任何处理.
+ * @author LamGC
+ */
+public class StringToStringConverter implements StringConverter<String> {
+    @Override
+    public String to(String source) {
+        return source;
+    }
+
+    @Override
+    public String from(String target) {
+        return target;
+    }
+}