environments list rejects --all and suggests --wallet #119

Problem

environments list rejects --all, and clap's suggestion and usage line point at an unrelated flag:

$ voltage environments list --org ORG --all
error: unexpected argument '--all' found

  tip: a similar argument exists: '--wallet'

Usage: voltage environments list --org <UUID> --wallet <UUID>

#82 made other lists accept --all when they return every item at once (#94), so an agent passes it here too. The tip then suggests --wallet, which has nothing to do with environments. The usage line also shows --wallet <UUID> as if it were required, which sends the agent looking for a wallet. Without --all, the command succeeds and lists every environment.

The parse error comes before any request, so this reproduces offline. Reproduced on v0.2.0 (6610d0f).

Suggested fix

Accept --all on environments list as a no-op, as the other single-page lists do. Keep --wallet out of this command's usage line and suggestions. Consider a test that every list subcommand accepts --all, so a new list can't miss it.