fix: examples and patch hub-web to use grpc-web default export

[pfletcherhill]

Motivation

• hub-nodejs chron-feed example used an out-of-date package version
• getHubRpcClient "Named export 'grpc' not found" in hub-web #863

Change Summary

• Upgrade hub-nodejs used in chron-feed example and integrate mentions as well
• Patch uses of @improbable-eng/grpc-web in hub-web to use the default export

Merge Checklist

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• PR title adheres to the conventional commits standard
• PR has a changeset
• PR has been tagged with a change label(s) (i.e. documentation, feature, bugfix, or chore)
• PR does not require changes to the protocol

Additional Context

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[changeset-bot]

🦋 Changeset detected

Latest commit: f8b9340

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@farcaster/hub-web	Patch

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[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.16 ⚠️

Comparison is base (39387aa) 72.55% compared to head (f8b9340) 72.39%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #867      +/-   ##
==========================================
- Coverage   72.55%   72.39%   -0.16%     
==========================================
  Files          66       66              
  Lines        5592     5614      +22     
  Branches     1292     1299       +7     
==========================================
+ Hits         4057     4064       +7     
- Misses       1434     1446      +12     
- Partials      101      104       +3     

see 6 files with indirect coverage changes

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[socket-security]

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👍 No new dependency issues detected in pull request

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Pull request alert summary

Issue	Status
Install scripts	✅ 0 issues
Native code	✅ 0 issues
Bin script shell injection	✅ 0 issues
Unresolved require	✅ 0 issues
Invalid package.json	✅ 0 issues
HTTP dependency	✅ 0 issues
Git dependency	✅ 0 issues
Potential typo squat	✅ 0 issues
Known Malware	✅ 0 issues
Telemetry	✅ 0 issues
Protestware/Troll package	✅ 0 issues

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📊 Modified Dependency Overview:

➕ Added Package	Capability Access	+/- Transitive Count	Publisher
@farcaster/hub-web@0.2.4	eval	+0	pfletcherhill