chore: switch testing to vitest, remove mocha, ts-mocha and chai

[NickKelly1]

also switch packages to type: module (esm) instead of commonjs

[github-actions[bot]]

:briefcase: Build Files chrome: enkrypt-chrome-74891b37.zip firefox: enkrypt-firefox-74891b37.zip

:syringe: Virus total analysis chrome: 74891b37 firefox: 74891b37