feat: improve swap input formatting

[denviljclarke]

Description

This fix parses user input to fix decimal formatting and disallows non-numerical characters. It also formats the output amount to display at most 6 significant digits.

You can view the preview here

Other changes

I also:

• removed max display & functionality if balance is 0
• I applied this formatting on the confirmation page as well
• truncated long input numbers with the ellipsis (similar to uni swap)

Tested

Swapped various tokens with various amounts

Related issues

• Fixes #85

Checklist before requesting a review

• [x] I have performed a self-review of my own code
• [ ] I have added tests that prove my fix is effective or that my feature works
• [x] The PR title follows the conventions
• [x] I have run the regression tests

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Name	Status	Preview	Comments	Updated (UTC)
mento-web	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 18, 2023 5:11pm