Describe your changes

• Upgrades our repo from eslint v8 to eslint v9
  • The big change is that we need to utilize eslint flat config
  • For reference, migration steps can be found here
• Updates a number of lint dependencies since we can now utilize the latest versions
  • Also updates the Dependabot config
  • Removes the https://github.com/iamturns/eslint-config-airbnb-typescript dependency since it has been archived by the owner
• In terms of source file changes, there are a few categories of changes:
  1. Eslint v9 now warns if there is an unused eslint-disable directive in code. This PR removes any unused eslint-disables
  2. A few of the rules were made to be stricter. For example, the no unused vars rule now checks against the variable argument in a catch statement. For now, I've disabled any existing violations
  3. A few of the rules were made to be more relaxed. For example, a few of the React Hook rules are now a bit more relaxed, so I removed any unnecessary eslint-disable directives for those.

GitHub Issue Link (if applicable)

Testing Plan

• ✅ This is a lint change, so it is checked at CI time
• I also have checked that the eslint plugin in Cursor/VSCode still work as expected locally

Contribution License Agreement

By submitting this pull request you agree that all contributions to this project are made under the Apache 2.0 license.