refactor(commands): slim the three entry commands to the claim handoff

`add`, `ak-add` and `note-add` keep the claim path and lose the flags that were
not part of it: `--wait`, `--timeout`, `--from-file`, `--from-key`, `--from-env`
and `--delete-source`.

A human terminal is unchanged: omitting the value still prompts with hidden
input, and passing it is still accepted. The `--claim` fill still shows the name
(and service, for an API key), reads the value hidden, stores it, and only then
spends the code.
