docs: add show catalogs sql reference (#3170)

Author: sundy-li

docs/cn/sql-reference/10-sql-commands/00-ddl/09-catalog/_category_.json

@@ -0,0 +1 @@
+{"label":"Catalog","position":9}

docs/cn/sql-reference/10-sql-commands/00-ddl/09-catalog/index.md

@@ -0,0 +1,6 @@
+---
+title: Catalog
+---
+| 命令 | 描述 |
+|---------|-------------|
+| [SHOW CATALOGS](show-catalogs.md) | 列出 catalog |

docs/cn/sql-reference/10-sql-commands/00-ddl/09-catalog/show-catalogs.md

@@ -0,0 +1,18 @@
+---
+title: SHOW CATALOGS
+sidebar_position: 1
+---
+
+列出 catalog。
+
+## 语法
+
+```sql
+SHOW CATALOGS [ LIKE '<pattern>' | WHERE <expr> ]
+```
+
+## 示例
+
+```sql
+SHOW CATALOGS;
+```

docs/cn/sql-reference/10-sql-commands/00-ddl/index.md

@@ -8,6 +8,7 @@ title: DDL（Data Definition Language）命令
 
 | 组件 | 描述 |
 |-----------|-------------|
+| **[Catalog](09-catalog/index.md)** | 查看可用 catalog 列表 |
 | **[数据库](00-database/index.md)** | 创建、修改和删除数据库 |
 | **[表](01-table/index.md)** | 创建、修改和管理表 |
 | **[表版本管理 (Table Versioning)](21-table-versioning/index.md)** | 创建命名快照标签用于时间回溯 |

docs/en/sql-reference/10-sql-commands/00-ddl/09-catalog/_category_.json

@@ -0,0 +1 @@
+{"label":"Catalog","position":9}

docs/en/sql-reference/10-sql-commands/00-ddl/09-catalog/index.md

@@ -0,0 +1,6 @@
+---
+title: Catalog
+---
+| Command | Description |
+|---------|-------------|
+| [SHOW CATALOGS](show-catalogs.md) | Lists catalogs |

docs/en/sql-reference/10-sql-commands/00-ddl/09-catalog/show-catalogs.md

@@ -0,0 +1,18 @@
+---
+title: SHOW CATALOGS
+sidebar_position: 1
+---
+
+Lists catalogs.
+
+## Syntax
+
+```sql
+SHOW CATALOGS [ LIKE '<pattern>' | WHERE <expr> ]
+```
+
+## Example
+
+```sql
+SHOW CATALOGS;
+```

docs/en/sql-reference/10-sql-commands/00-ddl/index.md

@@ -8,6 +8,7 @@ These topics provide reference information for the DDL (Data Definition Language
 
 | Component | Description |
 |-----------|-------------|
+| **[Catalog](09-catalog/index.md)** | List available catalogs |
 | **[Database](00-database/index.md)** | Create, alter, and drop databases |
 | **[Table](01-table/index.md)** | Create, alter, and manage tables |
 | **[Table Versioning](21-table-versioning/index.md)** | Create named snapshot tags for time travel |