[Portal] Minor docs updates for Nebula

[saminacodes]

CORE-0000

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PR-Codex overview

This PR focuses on updating content in the insight and nebula sections of the portal. It includes changes to titles, descriptions, and the addition of new links and components.

Detailed summary

• Updated ArticleCard title from "Blockchain Explorer" to "Insight Introduction".
• Added ExternalLink icon to the sidebar.
• Introduced new sidebar item "Playground" with a link to the playground.
• Added a section in faqs about the underlying model used by Nebula.
• Enhanced page.mdx for Nebula with a link to learn more.
• Added a new ArticleCard for "Telegram AI Bot".
• Included a new GithubTemplateCard for "ERC-20 Token Deployer".

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[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
thirdweb-www	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 22, 2025 8:43pm

4 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
docs-v2	⬜️ Skipped (Inspect)			Feb 22, 2025 8:43pm
login	⬜️ Skipped (Inspect)			Feb 22, 2025 8:43pm
thirdweb_playground	⬜️ Skipped (Inspect)			Feb 22, 2025 8:43pm
wallet-ui	⬜️ Skipped (Inspect)			Feb 22, 2025 8:43pm

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.83%. Comparing base (208b052) to head (984a384).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6320   +/-   ##
=======================================
  Coverage   56.83%   56.83%           
=======================================
  Files        1168     1168           
  Lines       64793    64793           
  Branches     5258     5258           
=======================================
  Hits        36824    36824           
  Misses      27242    27242           
  Partials      727      727           

Flag	Coverage Δ		*Carryforward flag
legacy_packages	65.68% <ø> (ø)		Carriedforward from d5ad571
packages	55.04% <ø> (ø)

*This pull request uses carry forward flags. Click here to find out more.

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
thirdweb (esm)	46.3 KB (0%)	926 ms (0%)	733 ms (+59.35% 🔺)	1.7 s
thirdweb (cjs)	121.89 KB (0%)	2.5 s (0%)	1.4 s (+9.85% 🔺)	3.9 s
thirdweb (minimal + tree-shaking)	5.6 KB (0%)	112 ms (0%)	30 ms (-61.41% 🔽)	141 ms
thirdweb/chains (tree-shaking)	506 B (0%)	10 ms (0%)	20 ms (-56.62% 🔽)	30 ms
thirdweb/react (minimal + tree-shaking)	19.29 KB (0%)	386 ms (0%)	146 ms (+49.18% 🔺)	531 ms

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