Add Lingering Aroma ability

MR Description

• Adds Oincologne's signature ability, Lingering Aroma.

Before testing

• Add it to Studio (symbol: lingering_aroma).

Notes to acknowledge before testing

• It works the exact same as Mummy.

Tests to realize

• Use a direct attack against a target with Lingering Aroma. The ability should transfer to the user.
• Use any other attack against the same target, nothing happens.
• If the attacker already has Lingering Aroma, nothing happens.

Sources related to this MR

• Bulbapedia link
• Pokepedia link