docs: Refactor CN tutorial structure and naming conventions (#2992)

* docs: Refactor CN tutorial titles for clarity and consistency

* docs: Improve CN tutorial titles to be more natural and action-oriented

* docs: Simplify CN tutorial titles to 'Tool + Action' format

* fix: Repair corrupted front matter in tutorial markdown files

* docs: Refactor tutorial titles to unified 'Action (Tool)' format

* docs: Standardize sidebar labels with 'Tool (Object)' format for clarity

* docs: Improve tutorial titles and sidebar labels for explicit natural flow

* docs: Update tutorial titles to 'Scenario (Tool)' format for maximum clarity

* docs: Refactor tutorial titles and sidebars to 'Use Tool to Action' guide format

* docs: Remove access-mysql-and-redis tutorial from CN docs

* docs: Rename 'Query System Metadata' tutorial to 'Query Stage File Metadata' for accuracy

* docs: Rename 'Cloud Ops' category to 'Manage Databend Cloud' and standardize items

* docs: Rename 'Cloud Ops' category to '云端运维' (Cloud Ops) for conciseness

* docs: Rename category to 'Cloud 平台功能' to better summarize content

* docs: Standardize category names to noun phrases (Client Connectivity, Data Ingestion, Backup & Recovery)

* chore: Remove accidental clipboard images

* fix: Restore 'access-mysql-and-redis' tutorial and update its title format

* docs: Remove 'access-mysql-and-redis' tutorial as requested

Author: BohuTANG

docs/cn/tutorials/cloud-ops/_category_.json

@@ -1,4 +1,4 @@
 {
-  "label": "云上运维",
+  "label": "Cloud 平台功能",
   "position": 6
 }

docs/cn/tutorials/cloud-ops/aws-billing.md

@@ -1,6 +1,6 @@
 ---
-title: "Databend Cloud：AWS 账单"
-sidebar_label: "AWS 账单"
+title: "查看 AWS 账单"
+sidebar_label: "查看 AWS 账单"
 ---
 
 在本教程中，我们将演示如何导入 AWS 账单数据，并通过 SQL 进行成本分析。你会学习如何把 AWS 账单数据加载进 Databend Cloud、使用查询找出主要成本驱动因素，并洞察 AWS 的使用方式。

docs/cn/tutorials/cloud-ops/dashboard.md

@@ -1,6 +1,6 @@
 ---
-title: "Databend Cloud：仪表盘导览"
-sidebar_label: "Dashboard"
+title: "仪表盘使用指南"
+sidebar_label: "使用仪表盘"
 ---
 import StepsWrap from '@site/src/components/StepsWrap';
 import StepContent from '@site/src/components/Steps/step-content';

docs/cn/tutorials/cloud-ops/link-tables.md

@@ -1,6 +1,6 @@
 ---
-title: "Databend Cloud：通过 ATTACH TABLE 共享数据"
-sidebar_label: "数据共享"
+title: "跨库共享数据"
+sidebar_label: "跨库共享数据"
 ---
 
 本教程将演示如何在 Databend Cloud 中使用 [ATTACH TABLE](/sql/sql-commands/ddl/table/attach-table) 命令，将一张 Databend Cloud 表链接到存放在 S3 Bucket 中的自建 Databend 表。

docs/cn/tutorials/develop/_category_.json

@@ -1,4 +1,4 @@
 {
-  "label": "Databend 开发",
+  "label": "应用开发",
   "position": 4
 }

docs/cn/tutorials/develop/python/integrating-with-databend-cloud-using-databend-driver.md

@@ -1,5 +1,6 @@
 ---
-title: "Python：使用 databend-driver 连接 Databend Cloud"
+title: "Python Driver 开发 (Cloud)"
+sidebar_label: "Python Driver 开发 (Cloud)"
 ---
 
 本教程将演示如何使用 `databend-driver` 连接 Databend Cloud，并通过 Python 创建表、插入数据与查询结果。

docs/cn/tutorials/develop/python/integrating-with-databend-cloud-using-databend-sqlalchemy.md

@@ -1,5 +1,6 @@
 ---
-title: "Python：使用 SQLAlchemy 连接 Databend Cloud"
+title: "SQLAlchemy 开发 (Cloud)"
+sidebar_label: "SQLAlchemy 开发 (Cloud)"
 ---
 
 本教程将演示如何借助 `databend-sqlalchemy` 连接 Databend Cloud，并使用 Python 创建表、插入数据与查询结果。

docs/cn/tutorials/develop/python/integrating-with-self-hosted-databend.md

@@ -1,5 +1,6 @@
 ---
-title: "Python：连接自建 Databend"
+title: "Python Driver 开发 (自建)"
+sidebar_label: "Python Driver 开发 (自建)"
 ---
 
 本教程介绍如何通过 Python 连接本地部署的 Databend，并分别使用 `databend-driver`、`databend-sqlalchemy` Connector 以及 Engine 三种方式完成建库、建表、写入、查询与清理等操作。

docs/cn/tutorials/getting-started/_category_.json

@@ -1,4 +1,4 @@
 {
-  "label": "连接 Databend",
+  "label": "客户端连接",
   "position": 1
 }

docs/cn/tutorials/getting-started/connect-to-databend-bendsql.md

@@ -1,6 +1,6 @@
 ---
-title: "使用 BendSQL 连接（自建版）"
-sidebar_label: "BendSQL（自建版）"
+title: "使用 BendSQL 连接自建 Databend"
+sidebar_label: "BendSQL 连接自建 Databend"
 ---
 
 import StepsWrap from '@site/src/components/StepsWrap';