Show agent profile card with description when hover on agent in chat view

- Create profile card componennt. Use it for agent profile card
- Pass agent persona from khoj server via API
- Put link to agent profile page in the hover card to make it 2 clicks
  away. Othewise inadvertent clicks on agent in chat view lead away to
  agent page
- Use tailwind line-clamp extension to clamp card to first two lines

src/interface/web/tailwind.config.ts

@@ -74,7 +74,10 @@ const config = {
             },
         },
     },
-    plugins: [require("tailwindcss-animate")],
+    plugins: [
+        require("tailwindcss-animate"),
+        require('@tailwindcss/line-clamp'),
+    ],
 } satisfies Config
 
 export default config