✏️ Change copy that prompts the user to buy a missing asset while swapping

[shivekkhurana]

Feature Issue

User Story

As a <user|developer|...>, I want to so that .

Description

Figma Link: https://www.figma.com/design/AD2JSKg0I8dZcylyiGa62O/Swap-for-Mobile?node-id=171-36214&m=dev

When the user is swapping an asset, it's possible that she might not have enough tokens to swap. This is where we plugin our error message with a CTA to buy.

For legal reasons we should not call it "Buy", but "Add assets" (check figma file). The title of the buy modal should also be updated.

Acceptance Criteria

• In case of insufficient assets to swap the CTA on error should say "Add assets"
• The buy modal should be titled "Ways to buy assets"