[Beginner][Document]Add v2.3.0 release note

docs/release/v2-3-0.en.md

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+# V2.3.0-release
+
+The main modifications of V2.3.0-release version focus on:
+
+## 1. Enhance the ability of partitioned tables:
+1）Add hash partition type and new default partition;
+
+2）Support the creation of default partition sub-tables, the partition key can be updated, and the partition parent table index operation automatically synchronizes the sub-table;
+
+3）Partition pruning optimization improved by 30%, performance improvement of partition join by nearly 10 times;
+
+## 2. Enhanced usability of remote multi-active:
+1）Using Extension mode, a closed loop is implemented within a center;
+
+2）Through the tbase_subscription tool, the parallelism of the subscription can be freely configured;
+
+3）Multi-CN load balancing subscription, flexible specification;
+
+## 3. Distributed deadlock automatic detection:
+1）EXTENSION mode installs pg_unlock tool, no manual configuration required;
+
+2）pg_unlock_check_deadlock deadlock detection;
+
+3）pg_unlock_execute deadlock release;
+
+4）pg_unlock_check_dependency transaction dependency detection;
+
+## 4. 2PC residual automatic cleaning:
+1）EXTENSION mode installs pg_clean tool, no manual configuration required;
+
+2）pg_clean_check_txn detects 2P residual;
+
+3）pgxc_get_record_list view residual events;
+
+4）pg_clean_execute automatic cleaning of 2PC residual.

docs/release/v2-3-0.md

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-本次升级的新特性详情：
-https://mp.weixin.qq.com/s/LMxwNUjfrggReGTQoB9F0A
+# V2.3.0-release
+
+V2.3.0-release 版本主要修改集中在：
+
+1. 分区表能力增强：
+    - 增加 hash 分区类型、新增 default 分区。
+    - 支持 default 分区子表创建、分区键可 update 修改功能、分区父表索引操作自动同步子表。
+    - 分区剪枝优化性能提升30%，分区 join 性能提升近10倍。
+
+2. 异地多活的易用性增强：
+
+    - EXTENSION 模式，在一个中心内部实现闭环。
+    - 通过 tbase_subscription 工具，指定订阅的并行度自由配置。
+    - 多CN负载均衡订阅，灵活指定。
+
+3. 分布式死锁自动检测：
+
+    - EXTENSION 模式安装 pg_unlock 工具，无需手动配置。
+    - pg_unlock_check_deadlock 死锁检测。
+    - pg_unlock_execute 死锁解除。
+    - pg_unlock_check_dependency 事务依赖关系检测。
+
+4. 2PC残留自动清理：
+
+    - EXTENSION模式安装pg_clean工具，无需手动配置。
+    - pg_clean_check_txn 检测2P残留。
+    - pgxc_get_record_list 查看残留事件。
+    - pg_clean_execute 自动清理2PC残留。