sample(sample/22): fix Prisma 7 compatibility

[mag123c]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe: Sample(22) update for Prisma 7 compatibility

What is the current behavior?

Sample 22-graphql-prisma fails with Prisma 7 due to breaking changes

Issue Number: #15965

What is the new behavior?

• Removed url from schema.prisma datasource block
• Added prisma.config.ts for datasource configuration
• Added moduleFormat = "cjs" for NestJS CommonJS compatibility
• Updated prisma.service.ts to use @prisma/adapter-better-sqlite3

Does this PR introduce a breaking change?

• Yes
• No

[coveralls]

Pull Request Test Coverage Report for Build b9252815-71a8-4b9b-844a-abd377a3910b

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 88.939%

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Totals
Change from base Build c89172e7-62df-46f3-b84f-5b3077430054:	0.0%
Covered Lines:	7325
Relevant Lines:	8236

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💛 - Coveralls