[NOREF] Upgraded React -> v18 && Trussworks -> v6 && Node -> v20.12.2

[patrickseguraoddball]

NOREF

Description

• Upgraded react & react-dom -> ^18.3.1
  • NOTE: Typescript currently has issues with @types/react & @types/react-dom and needs a resolution to @types/react@17.*
  • https://zackery.dev/posts/types-react/#fromHistory
  • This resolution was technically added in the previous dependabot PR, but holding off on upgrading @types/react to ^18.3.1 until resolved
• Upgraded @trussworks/react-uswds -> ^6.0.0
  • Replaced instances of Dropdown with Select
• Upgraded Node -> v20.12.2

React v19 is technically out, but included more breaking changes

How to test this change

• Tests pass and functionally works as always

PR Author Checklist

• I have provided a detailed description of the changes in this PR.
• I have provided clear instructions on how to test the changes in this PR.
• I have updated tests or written new tests as appropriate in this PR.

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