feat(exists): expose the ability to check if config exists

feat(load): throw an error if no config is found when loading

fix(deps): upgraded core

fix(deps): update dependency cosmiconfig to v9

Merge pull request #52 from form8ion/beta

chore(node-version): upgraded the dev version to v20

fix(dual-mode): generated proper cjs and es module versions

test(integration): broke the features out to separate files

Merge pull request #6 from form8ion/alpha

feat(write): exposed a function for writing the config file

closes #2