[SWA-98][FIX] - 1inch API changes fix

[ElRodrigote]

Fixes: SWA-98

Description

• Add an env variable with a default 1inch proxy URL for dev purposes
• Consume new SDK changes for 1inch API updates

Visual evidence

How to test the changes

1) Pull this branch 2) Run the project locally 3) Go to Swapr landing page 4) Connect your wallet 5) Try to do a Swap in Mainnet, Arbitrum (or any 1inch supported chain)

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Lighthouse	1 paths audited Performance: 25 (no change from production) Accessibility: 83 (no change from production) Best Practices: 92 (no change from production) SEO: 67 (no change from production) PWA: 80 (no change from production) View the detailed breakdown and full score reports

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