[Snyk] Security upgrade react-scripts from 2.1.8 to 5.0.0

[CloudPower97]

Snyk has created this PR to fix 2 vulnerabilities in the yarn dependencies of this project.

Snyk changed the following file(s):

• client/package.json
• client/yarn.lock

Note for zero-installs users

If you are using the Yarn feature zero-installs that was introduced in Yarn V2, note that this PR does not update the .yarn/cache/ directory meaning this code cannot be pulled and immediately developed on as one would expect for a zero-install project - you will need to run yarn to update the contents of the ./yarn/cache directory.
If you are not using zero-install you can ignore this as your flow should likely be unchanged.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Improper Handling of Unicode Encoding SNYK-JS-TAR-15038581	713
	Use of a Cryptographic Primitive with a Risky Implementation SNYK-JS-ELLIPTIC-14908844	708

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• Max score is 1000. Note that the real score may have changed since the PR was raised.
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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Align Node engine with react-scripts 5 requirements

The repo pins Node 10.x in the root package.json engines (lines 7–9), while react-scripts 5 no longer supports Node 10. If builds honor the engines field (e.g., Heroku via heroku-postbuild), installing or running yarn build for the client will fail after this upgrade. Consider bumping the engines field to a supported Node version or keeping react-scripts on a version compatible with Node 10 to avoid breaking CI/deploys that follow the engine pin.

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