Nav Menu Upgrades and Minor UX Improvements (#869)

* Converted navigation menu into a dropdown menu
* Moved collapsed side panel menu icons into top row
* Auto refresh when conversation is deleted to update side panel and route back to main page if deletion is on current conversation
* Highlight the current conversation in the side panel
* Dynamic homepage messages with current day and time of day.
* `colorutils` upgraded to have more expansive tailwind color options and dynamic class name generation.
* Converted create agent button alert into shadcn `ToolTip`
* Colored lines and icons for agents in chat window
* Cleaned up border styling in dark mode
* fixed three dot menu in side panel to be more easier to click
* Add the KhojLogo import in the nav menu and use a default user profile icon when not authenticated
* Get rid of custom --box-shadow CSS variable
* Pass the agent metadat through the chat body data in order to style the send button
* Add login to the unauthenticated login view, redirecto to home if conversation history not loaded
* Set a max height for the input text area
* Simplify tailwind class names

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Co-authored-by: sabaimran <narmiabas@gmail.com>

src/interface/web/app/common/iconUtils.tsx

@@ -46,7 +46,6 @@ function getIconFromIconName(iconName: string, color: string = 'gray', width: st
     const icon = iconMap[iconName];
     const colorName = color.toLowerCase();
     const colorClass = convertColorToTextClass(colorName);
-
     return icon ? icon(colorClass, width, height) : null;
 }