Unit tests for virtual cards backend

[EresDev]

The tests with this repository are e2e tests. That's how I started the virtual cards feature and used e2e tests.
As the feature is getting refined, I think it would be good idea to bring in unit tests for the backend functions. Cloudflare recommends vitest because backend functions are Cloudflare pages function. Along with the general advantages of unit tests over e2e tests, I see following reasons to have them.

• These tests will mock Reloadly, which e2e is not doing and the recent problem with their API slowed our progress.
• Testing edge cases for the security of order placement will be easier

[ubiquibot]

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[hydroxylase]

/start

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[ubiquibot-dev]

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[ubiquibot]

+ Successfully registered wallet address

[hydroxylase]

/start

[ubiquibot-dev]

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[ubiquibot]

Deadline	Thu, Aug 15, 9:00 AM UTC
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Tips:

• Use /wallet 0x0000...0000 if you want to update your registered payment wallet address.
• Be sure to open a draft pull request as soon as possible to communicate updates on your progress.
• Be sure to provide timely updates to us when requested, or you will be automatically unassigned from the task.

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[pbkompasz]

/start

[ubiquity-os]

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Tips:

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• Be sure to provide timely updates to us when requested, or you will be automatically unassigned from the task.

[EresDev]

/start

[ubiquity-os]

Warning!	This task was created over 80 days ago. Please confirm that this issue specification is accurate before starting.
Deadline	Tue, Oct 29, 8:11 AM UTC
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Tip

• Use /wallet 0x0000...0000 if you want to update your registered payment wallet address.
• Be sure to open a draft pull request as soon as possible to communicate updates on your progress.
• Be sure to provide timely updates to us when requested, or you will be automatically unassigned from the task.

[ubiquity-os]

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@EresDev

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The tests with this repository are e2e tests. That's how I start…	12.14 content: content: p: score: 0 elementCount: 4 a: score: 5 elementCount: 1 ul: score: 1 elementCount: 1 li: score: 0.5 elementCount: 2 result: 7 regex: wordCount: 103 wordValue: 0.1 result: 5.14	1	36.42
Resolves #271With unit tests, it also includes some renaming a…	4.5 content: content: p: score: 0 elementCount: 5 h3: score: 1 elementCount: 2 ul: score: 1 elementCount: 1 li: score: 0.5 elementCount: 3 result: 4.5 regex: wordCount: 65 wordValue: 0 result: 0	0.9	0