feat: make URLs in dashboard description clickable

[murataslan1]

Summary

URLs pasted in dashboard description are now clickable links.

Problem

When users paste URLs in dashboard description, they appear as plain text and are not usable.

Solution

Added a linkifyText utility function that:

• Detects URLs (http/https) in the description text
• Converts them to clickable <a> tags
• Opens links in new tab with target="_blank"
• Adds proper security attributes (rel="noopener noreferrer")

Changes

• Renamed utils.ts to utils.tsx to support JSX
• Added linkifyText function
• Updated description rendering to use linkifyText
• Added link styling for both dark and light modes

Fixes #5256

---

Note

Convert URLs in dashboard descriptions to clickable links with theme-aware styling.

• Dashboard Description:
  • Render description using linkifyText(description) in frontend/src/container/NewDashboard/DashboardDescription/index.tsx to convert URLs to clickable links (opens in new tab with safe attrs).
• Utilities:
  • Add linkifyText in frontend/src/container/NewDashboard/DashboardDescription/utils.tsx to detect http/https URLs and return linkified parts.
• Styles:
  • Add .dashboard-description-link styles (hover states) under .dashboard-description-section for dark and light modes in frontend/src/container/NewDashboard/DashboardDescription/Description.styles.scss.

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Bug: URL regex captures trailing punctuation causing broken links

The URL regex /(https?:\/\/[^\s]+)/g matches all non-whitespace characters after the URL scheme, which incorrectly includes trailing punctuation that commonly follows URLs in natural text. When users write sentences like "Visit https://example.com." or "See https://example.com, for details", the period or comma becomes part of the captured URL, creating broken links. This affects the core functionality since ending sentences with punctuation after a URL is extremely common.