Migrate from mono repo

[denysoblohin-okta]

• Migrated commit history and tags excluding ones for other packages with git filter-branch

  
  git filter-branch  --tree-filter  'rm -rf packages/jwt-verifier packages/configuration-validation packages/okta-angular packages/okta-vue packages/okta-react packages/okta-react-native packages/jwt-validator'  --tag-name-filter cat --prune-empty --force  HEAD --all 

git tag -l 'angular' -l 'react' -l 'vue' -l 'jwt-verifier' -l 'configuration-validation' | xargs git tag -d

- Moved package to root, fixed links, removed lerna
- Added build script with modifying `private`

Internal ref: [OKTA-415308](https://oktainc.atlassian.net/browse/OKTA-415308)

[denysoblohin-okta]

Closed in favour of https://github.com/okta/okta-oidc-middleware/pull/2