Update to eslint v10

[jjspace]

• Update peer dependency to ESLint v10
  • Update related plugins as well
  • Bump minimum Node version based on ESLint's minimum
• Update to ES2022 in browser recommended config, see Consider updating to ECMA version 2022 cesium#12623
• Minor repo cleanup - add .prettierrc, fix changelog headings

The migration guide is here: https://eslint.org/docs/latest/use/migrate-to-10.0.0

When doing this update the biggest change that affects us is the 3 new rules added to the base JS recommendataions from @eslint/js outlined here.
We may want to hold off merging this PR and publishing a new release until we've decided if any of these should be disabled again. This can be done easily by cloning both repos and updating the npm package version for the eslint config to file://[path to this repo]