chore(docs): use Vite to build docs site

[paolostyle]

Description

Problem
The docs site is using long deprecated create-react-app. This PR replaces the build system with Vite, a faster and more modern tool. It also automatically links react-datepicker to the local version instead of relying on Webpack's janky path rewrites. A nice bonus of this change is that it fixed the visual glitch of the datepicker's dropdown appearing at the top left corner of the browser for a split second.

Changes

• replaces react-scripts with Vite
• adds missing dependencies to the dependency list (these were all used before, they just weren't listed in dependencies, relying on transitive dependencies)

Contribution checklist

• I have followed the contributing guidelines.
• I have added sufficient test coverage for my changes.
• I have formatted my code with Prettier and checked for linting issues with ESLint for code readability.

[pullrequest]

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[pullrequest]

PullRequest Breakdown

Reviewable lines of change

+ 258
- 242

78% JavaScript
11% HTML
9% JSON
2% Other

Generated lines of change

+ 3,330
- 11,880

Type of change

Feature - These changes are adding a new feature or improvement to existing code.

[martijnrusschen]

We should probably call this somewhere in the CI script as well

[martijnrusschen]

Add to .github/workflows/build-docs-site.yml

- name: Run linter
        run: yarn --cwd docs-site lint

[martijnrusschen]

Confirmed the docs site still works with Vite. Nice contribution!

[pullrequest]

Nice work here. I don't have any concerns with these changes.

Graham C

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