test(api): add e2e test for setting and getting marxan input

[Dyostiq]

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marxan – ./app

🔍 Inspect: https://vercel.com/vizzuality1/marxan/2h5DuFRbVQFeqVLB32xkRMpv8XSA
✅ Preview: https://marxan-git-feature-marxan-301-e2e-test-vizzuality1.vercel.app

marxan-storybook – ./app

🔍 Inspect: https://vercel.com/vizzuality1/marxan-storybook/6nfyji3N55Ab3TvrL5HFJxgxEzGo
✅ Preview: https://marxan-storybook-git-feature-marxan-301-e2e-test-vizzuality1.vercel.app