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/package.json

@@ -31,6 +31,7 @@
     "@radix-ui/react-scroll-area": "^1.1.0",
     "@radix-ui/react-slot": "^1.1.0",
     "@radix-ui/react-toggle": "^1.1.0",
+    "@tailwindcss/line-clamp": "^0.4.4",
     "@types/dompurify": "^3.0.5",
     "@types/katex": "^0.16.7",
     "@types/markdown-it": "^14.1.1",