feat: add tokens page e2e test

[Liam-Zhao]

Description

Related Issue

Motivation and Context

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Merging #329 (4e4406b) into main (36f588f) will increase coverage by 3.74%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #329      +/-   ##
==========================================
+ Coverage   48.18%   51.93%   +3.74%     
==========================================
  Files          28       28              
  Lines        2839     2817      -22     
  Branches      809      791      -18     
==========================================
+ Hits         1368     1463      +95     
+ Misses       1470     1352     -118     
- Partials        1        2       +1     

Files	Coverage Δ
src/components/developer/tokens/index.tsx	79.79% <100.00%> (+79.79%)	⬆️

... and 3 files with indirect coverage changes

[gaius-qi]

LGTM