Dark theme for Explorer (#2185)

* First dark theme commits for command bar

* Updated theme on sidebar

* Updated tabs, sidebar, splash screen

* settings theme changes

* Dark theme applied to Monaco editor

* Dark theme to stored procedures

* Fixed sidebar scroll

* Updated scroll issue in sidebar

* Command bar items fixed

* Fixed lint errors

* fixed lint errors

* settings side panel fixed

* Second last iteration for css

* Fixed all the issues of css

* Updated the theme icon for now on DE to change the theme from portal/DE itself

* Formatting issue resolved

* Remove CloudShellTerminalComponent changes - revert to master version

* Fixed test issue

* Fixed formatting issue

* Fix tests: update snapshots and revert xterm imports for compatibility

* Fix xterm imports in CloudShellTerminalComponent to use @xterm packages

* Fix Cloud Shell component imports for compatibility

* Update test snapshots

* Fix xterm package consistency across all CloudShell components

* Fix TypeScript compilation errors in CloudShell components and query Documents

- Standardized xterm package imports across CloudShell components to use legacy 'xterm' package
- Fixed Terminal type compatibility issues in CommonUtils.tsx
- Added type casting for enableQueryControl property in queryDocuments.ts to handle Azure Cosmos SDK interface limitations
- Applied code formatting to ensure consistency

* Update failing snapshot tests

- Updated TreeNodeComponent snapshot tests for loading states
- Updated ThroughputInputAutoPilotV3Component snapshots for number formatting changes (10,00,000 -> 1,000,000)
- All snapshot tests now pass

* Fixed test issue

* Fixed test issue

* Updated the buttons for theme

* Updated the Theme changes based on portal theme changes

* Updated review comments

* Updated the duplicate code and fixed the fabric react error

* Few places styling added and resolving few comments

* Fixed errors

* Fixed comments

* Fixed comments

* Fixed comments

* Fixed full text policy issue for mongoru accounts

* Resolved comments for class Name and few others

* Added css for homepage in ru accounts

* Final commit with all the feedback issues resolved

* Lint error resolved

* Updated the review comments and few Ui issues

* Resolved review comments and changed header bg and active state color

* Moved svg code to different file and imported

* css fixed for the hpome page boxed for ru account

* Lint errors

* Fixed boxes issue in ru accounts

* Handled the initial theme from the portal

* Updated snap

* Update snapshots for TreeNodeComponent and CreateCopyJobScreensProvider tests

* Fix duplicate DataExplorerRoot test id causing Playwright strict mode violation

* Fix locale-dependent number formatting in ThroughputInputAutoPilotV3Component

---------

Co-authored-by: Sakshi Gupta <sakshig+microsoft@microsoft.com>
Co-authored-by: Sakshi Gupta <sakshig@microsoft.com>

src/Explorer/Controls/CommandButton/CommandButtonComponent.tsx

@@ -58,6 +58,26 @@ export interface CommandButtonComponentProps {
    */
   tooltipText?: string;
 
+  /**
+   * Custom styles to apply to the button using Fluent UI theme tokens
+   */
+  styles?: {
+    root?: {
+      backgroundColor?: string;
+      color?: string;
+      selectors?: {
+        ":hover"?: {
+          backgroundColor?: string;
+          color?: string;
+        };
+        ":active"?: {
+          backgroundColor?: string;
+          color?: string;
+        };
+      };
+    };
+  };
+
   /**
    * tabindex for the command button
    */
@@ -250,6 +270,8 @@ export class CommandButtonComponent extends React.Component<CommandButtonCompone
       contentClassName += " hasHiddenItems";
     }
 
+    const style = this.props.styles?.root || {};
+
     return (
       <div className="commandButtonReact">
         <span
@@ -262,6 +284,7 @@ export class CommandButtonComponent extends React.Component<CommandButtonCompone
           aria-disabled={this.props.disabled}
           aria-haspopup={this.props.hasPopup}
           aria-label={this.props.ariaLabel}
+          style={style}
           onClick={(e: React.MouseEvent<HTMLSpanElement>) => this.commandClickCallback(e)}
         >
           <div className={contentClassName}>