Add messages delete command

[dapi]

Problem

There is no way to delete messages via tgcli. This is needed for common workflows like:

• Cleaning up drafts from Saved Messages after publishing to a channel
• Deleting outdated messages
• Removing duplicate messages

Current behavior

tgcli messages only supports list, search, show, context subcommands. No delete.

Expected behavior

Add tgcli messages delete command:

tgcli messages delete --chat <chat_id> --message-id <id>
tgcli messages delete --chat me --message-id 357831  # delete from Saved Messages

Optionally support multiple IDs:

tgcli messages delete --chat me --message-id 357831,357832,357844,357845

Context

tgcli v2.3.0. Telegram API supports messages.deleteMessages — this is a straightforward addition.