test: 💍 Add test coverage with mocked GraphQL layer (initial)

[heldrida]

Why?

Clear and short explanation here.

How?

• Use msw
• Use schema
• Create test suite

Tickets?

• PLAT-1653

Contribution checklist?

• The commit messages are detailed
• The build command runs locally
• Assets or static content are linked and stored in the project
• You have manually tested
• You have provided tests

Security checklist?

• Sensitive data has been identified and is being protected properly
• Injection has been prevented (parameterized queries, no eval or system calls)

Preview?

[changeset-bot]

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Latest commit: ed1ac05

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