Added a percentage % feature in the swap and bridge sections

from the user interface, in my opinion, it is very easy to understand and the use of colors is also interesting. I asked to add the % percentage button feature in the swap section, Add LP or even in the bridge section. it will be more interesting.
STX : ST2S2PY9HXX41AKSQEG1TJ9A4E4A0DNBAAMTHRKHB
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