docs: modify docs display & add images (#17575)

### Summary

modify docs display
add some images
delete enterprise docs
standardize capitalization

docs/administrator/admin/ragflow_cli.md

@@ -1,5 +1,7 @@
 ---
 sidebar_position: 2
+title: RAGFlow CLI
+sidebar_label: RAGFlow CLI
 slug: /admin_cli
 sidebar_custom_props: {
   categoryIcon: LucideSquareTerminal
@@ -35,7 +37,7 @@ The RAGFlow CLI is a command-line-based system administration tool that offers a
 
     - -p: RAGFlow admin server port
 
-## Default administrative account
+## Default Administrative Account
 
 - Username: admin@ragflow.io
 - Password: admin
@@ -44,7 +46,7 @@ The RAGFlow CLI is a command-line-based system administration tool that offers a
 
 Commands are case-insensitive and must be terminated with a semicolon(;).
 
-### Service manage commands
+### Service Manage Commands
 
 `LIST SERVICES;`
 
@@ -121,7 +123,7 @@ Commands are case-insensitive and must be terminated with a semicolon(;).
 - Lists the agents associated with the specified user.
 - [Example](#example-list-agents-of-user)
 
-### System info
+### System Info
 
 `SHOW VERSION;`
 - Display the current RAGFlow version.