Add a better error for pin_versions()

[juliasilge]

Closes #656

library(pins)
tmp <- tempdir()
board <- board_folder(tmp, versioned = TRUE)
pin_write(board, mtcars, 'my-beautiful-cars')
#> Guessing `type = 'rds'`
#> Creating new version '20220930T035916Z-66143'
#> Writing to pin 'my-beautiful-cars'
pin_versions(board)
#> Error in `pin_versions()`:
#> ! Argument `name` is missing, with no default

#> Backtrace:
#>     ▆
#>  1. └─pins::pin_versions(board)
#>  2.   └─rlang::abort("Argument `name` is missing, with no default") at pins-r/R/pin_versions.R:42:4
pin_versions(board, 'my-beautiful-cars')
#> # A tibble: 1 × 3
#>   version                created             hash 
#>   <chr>                  <dttm>              <chr>
#> 1 20220930T035916Z-66143 2022-09-29 21:59:16 66143

^{Created on 2022-09-29 with reprex v2.0.2}

We decided that we're not ready to deprecate or remove any of the code that keeps the v0 interface working, so for the time being, let's add more logic for this improved error.

[github-actions]

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