Fix: Switch the default theme from light mode to dark mode and improve some styles #9869 (#10552)

### What problem does this PR solve?

Fix: Switch the default theme from light mode to dark mode and improve
some styles #9869
-Update UI component styles such as input boxes, tables, and prompt
boxes
-Optimize login page layout and style details
-Revise some of the wording, such as uniformly changing "data flow" to
"pipeline"
-Adjust the parser to support the markdown type

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/locales/zh.ts

@@ -268,25 +268,25 @@ export default {
           <br/>
           是否要继续？
       `,
-      extractRaptor: '从文档中提取Raptor',
+      extractRaptor: '从文档中提取RAPTOR',
       extractKnowledgeGraph: '从文档中提取知识图谱',
       filterPlaceholder: '请输入',
       fileFilterTip: '',
       fileFilter: '正则匹配表达式',
       setDefaultTip: '',
       setDefault: '设置默认',
-      eidtLinkDataPipeline: '编辑数据流',
+      eidtLinkDataPipeline: '编辑pipeline',
       linkPipelineSetTip: '管理与此数据集的数据管道链接',
       default: '默认',
-      dataPipeline: '数据流',
-      linkDataPipeline: '关联数据流',
+      dataPipeline: 'pipeline',
+      linkDataPipeline: '关联pipeline',
       enableAutoGenerate: '是否启用自动生成',
       teamPlaceholder: '请选择团队',
-      dataFlowPlaceholder: '请选择数据流',
+      dataFlowPlaceholder: '请选择pipeline',
       buildItFromScratch: '去Scratch构建',
-      dataFlow: '数据流',
-      parseType: '切片方法',
-      manualSetup: '手动设置',
+      dataFlow: 'pipeline',
+      parseType: 'Ingestion pipeline',
+      manualSetup: '选择pipeline',
       builtIn: '内置',
       titleDescription: '在这里更新您的知识库详细信息，尤其是切片方法。',
       name: '知识库名称',
@@ -1611,7 +1611,7 @@ General：实体和关系提取提示来自 GitHub - microsoft/graphrag：基于
       <p>要保留这些更改，请点击“重新运行”以重新运行当前阶段。</p> `,
       changeStepModalConfirmText: '继续切换',
       changeStepModalCancelText: '取消',
-      unlinkPipelineModalTitle: '解绑数据流',
+      unlinkPipelineModalTitle: '解绑pipeline',
       unlinkPipelineModalContent: `
       <p>一旦取消链接，该数据集将不再连接到当前数据管道。</p> 
       <p>正在解析的文件将继续解析，直到完成。</p>