chore(protocol-designer): Add tslib back into Vite config to fix whitescreen

[SyntaxColoring]

Overview

In edge, PD is whitescreening with this console error:

13:11:30.678 index.js:3 Uncaught TypeError: Cannot destructure property '__extends' of 'import_tslib.default' as it is undefined.
    at index.js:3:5
(anonymous) @ index.js:3
13:13:18.067 (index):1 Unchecked runtime.lastError: Could not establish connection. Receiving end does not exist.

I do not understand any of this, but from git bisecting, the apparent cause is #20207's removal of include: ['tslib'] and/or dedupe: ['tslib'] from our Vite config. None of our other projects need this, so it's likely that there's some PD-specific weirdness going on here—possibly some misconfiguration somewhere else—but I haven't looked into it. This PR reverts the change as a quick fix to unblock development.

Test Plan and Hands on Testing

• PD doesn't whitescreen now.

Review requests

Any better ideas?

Risk assessment

Low?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.38%. Comparing base (f53562b) to head (d3fc0b1).
⚠️ Report is 1 commits behind head on edge.

Additional details and impacted files

@@           Coverage Diff           @@
##             edge   #20229   +/-   ##
=======================================
  Coverage   56.38%   56.38%           
=======================================
  Files        3623     3623           
  Lines      301011   301011           
  Branches    42246    42246           
=======================================
  Hits       169720   169720           
  Misses     131065   131065           
  Partials      226      226           

Flag	Coverage Δ
protocol-designer	19.24% <ø> (ø)

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