WIP: feat: add update script and front-end file for email builder

[danni-cool]

No description provided.

[deepsource-io]

Here's the code health analysis summary for commits e0a29e6..20f82f3. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Test coverage	✅ Success		View Check ↗
Go	✅ Success		View Check ↗

Code Coverage Report

Metric	Aggregate	Go
Composite Coverage	41.7%	41.7%
Line Coverage	41.7%	41.7%

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 24 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
example/admin/router.go	0.00%	24 Missing ⚠️

Files with missing lines	Coverage Δ
example/admin/router.go	30.61% <0.00%> (-9.93%)	⬇️