Rename shared configs by grouping in folders

[edg2s]

e.g.

• client-es5 -> client/es5
• mediawiki-quint -> mediawiki/qunit
• vue3-common -> vue3/common

Fixes #525

[edg2s]

This is obviously a large breaking change, so we should be sure this is a sensible approach before merging.

[jdforrester]

Can we leave the old names as redirects ('client-es5': require('client/es5') etc.)?

[edg2s]

Can we leave the old names as redirects ('client-es5': require('client/es5') etc.)?

All the old names are kept as aliases for now: https://github.com/wikimedia/eslint-config-wikimedia/pull/527/files#diff-4e1706d3d1da0ad393b3151e9020e0d075c13b930439acc3c6d12ece63ad7da7

[jdforrester]

Leaving for review by others before merging, as Ed says.

[jdforrester]

Do we want to land this and make a new release?

[edg2s]

Do we want to land this and make a new release?

Happy to land it.