Disallow plural-suffixed keys as `t` values

[cbejensen]

🚀 Feature Proposal

Enable disallowing plural-suffixed keys as the first argument to t, perhaps through CustomTypeOptions.

Motivation

1. The TS autocomplete list for t can easily become very large and hard to look through.
2. I'd never do t('key_one') or t('key_other'), I'd always do t('key', { count }).

Considering these, it would be great if the plural-suffixed variations of keys were not considered valid. This would drastically decrease the number of options in my IDE autocomplete and help discourage bad practice. Currently, a key in English with _one and _other suffixes creates 6 possible values:

• key
• key_one
• key_other
• translation:key
• translation:key_one
• translation:key_other

This could be only 2 values if we removed the plural-suffixed options.

Example

I type t(', then ctrl+space to open autocomplete, and I only see the basic keys without plural suffixes.

Additionally, if I try to include the plural suffix in the key instead of using the count option for some reason, I get a type error, which is desired.

[adrai]

Feel free to try to provide a PR.