feat: add popover with link to Wan Fun Control template on pricing table (#7363)

## Summary
- Add clickable popover to the "What is this?" help text in video
estimates
- Explains that estimates are based on the Wan Fun Control template for
5-second videos
- Includes direct link to try the template:
`cloud.comfy.org/?template=video_wan2_2_14B_fun_camera`

This improves user understanding of how video estimates are calculated
and provides easy access to try the template that the estimates are
based on.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7363-feat-add-popover-with-link-to-Wan-Fun-Control-template-on-pricing-table-2c66d73d36508109b7a6ef80f978448e)
by [Unito](https://www.unito.io)

---------

Co-authored-by: GitHub Action <action@github.com>

src/locales/en/main.json

@@ -2011,6 +2011,8 @@
     "customLoRAsLabel": "Import your own LoRAs",
     "videoEstimateLabel": "Approx. amount of 5s videos generated with Wan Fun Control template",
     "videoEstimateHelp": "What is this?",
+    "videoEstimateExplanation": "These estimates are based on the Wan Fun Control template for 5-second videos.",
+    "videoEstimateTryTemplate": "Try the Wan Fun Control template →",
     "upgradeTo": "Upgrade to {plan}",
     "changeTo": "Change to {plan}",
     "credits": {