fix: type note_type and note params

[mokevnin]

Note models typed note_type as String and params as Unknown. The amoCRM docs define ten note types and a params shape for each.

• New Amocrm::NoteType: an enum of the ten documented values.
• New Amocrm::NoteParams: a union of Call, Geolocation, Attachment, MessageCashier (its status is an enum), ServiceMessage, Sms and Common. The fields come from the documented examples. The union has no discriminator of its own, so the variants go from most specific to Common; otherwise {status:, text:} would parse as Common.
• Retyped models: note_type and params in the ten note request and response models, and in the entity_notes and entity_notes_by_parent resource signatures, in lib, rbi and rbs.
• Unchanged: params stays optional, as it was.
• Test: covers the request body of create_by_parent and parsing params by their shape.

client.entity_notes_by_parent.create_by_parent(
  lead_id,
  entity_type: :leads,
  body: [{note_type: :common, params: Amocrm::NoteParams::Common.new(text: "…")}]
)

The spec side is Hexlet/amocrm-api#3.

rake lint (rubocop, Sorbet, Steep) and rake test (211 runs, 0 failures) pass.

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