[Enhancement] Item: better handling of disabled

[jakobe]

• I have written a good issue

Describe the enhancement

• replace attribute binding [attr.disabled] on ion-item with a property binding on the disabled prop.
  When setting disabled="false" on kirby-item the attribute binding ends up rendering the attribute as disabled="false" but the presence of the attribute marks the element as disabled. Ionic already renders this attribute properly on the native html button inside the shadow dom
• consider if nested interactive elements (checkbox, radio, toggle) should be disabled when the item is disabled?

Describe the solution you'd like

Have you considered any alternatives?

Are there any additional context?

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