feat: add note_create tool (Secure Note items)

[u2giants]

Follow-up to #7.

Add a note_create tool that creates a Secure Note item
(ItemCategory.SecureNote).

Inputs: vaultId, title, notes, optional tags, optional fields
(reuse the {idOrTitle, type:'text'|'concealed', value, section?} shape
from item_edit).

Notes

• Mirror password_create conventions (errorResult, log/logError,
  SDK items.create).
• No any; use @1password/sdk types.
• Add tests with a mocked client.

[CakeRepository]

Sorry going to use your PR didn't see until after clicked that off