Labels should be configurable/overridable

[adiba]

I guess labels should be configurable via formSubmissionOverrides and formOverrides in payload.config.ts
It's just not yet implemented (see here and here).

This should work but it doesn't

    formBuilder({
      formOverrides: {
        labels: {
          singular: {
            en: "Form",
            xx: "Xxxxx",
          },
          plural: {
            en: "Forms",
            xx: "Xxxxxx",
          },
        },
      },

Originally posted by @zanami in #11 (comment)

[jacobsfletch]

@adiba thank you for tracking this! Just opened a PR. Will have a release out shortly.