Added Pica8 to trigger.netdevices.NetDevice._set_commit_commands
Added Pica8 to list of SUPPORTED_VENDORS.
Added pica8 to rest of vars.
Fixed pica8 prompt.
bin/run_cmds now works with Pica8 for output that does not page.
Added new twister.TriggerSSHAsyncPtyChannel for Pica8 to append '| no-more' to show commands.