Add CSV export functionality

[13Bytes]

• refactor pagination component

[Copilot]

Pull request overview

This PR adds CSV export functionality to the transaction list and refactors pagination across multiple pages into a reusable component. The changes also include a file reorganization (moving src/pages/me.tsx to src/pages/me/index.tsx) and configuration updates to the Prisma database client.

Changes:

• Added CSV export functionality to the transaction list with time-based filtering options
• Extracted pagination logic into a reusable Pagination component
• Added datasourceUrl configuration to PrismaClient initialization
• Moved /me page to /me/index.tsx (file reorganization)

Reviewed changes

Copilot reviewed 11 out of 12 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
src/server/db.ts	Added explicit datasourceUrl configuration to PrismaClient
src/server/api/routers/transactions.ts	Added new getAllFixedTimespan endpoint for fetching transactions by time period
src/pages/me/index.tsx	Moved from src/pages/me.tsx with indentation changes
src/pages/me.tsx	File removed (relocated to subfolder)
src/pages/admin/grouporders.tsx	Refactored to use new Pagination component and reorganized imports
src/pages/admin/allTransactions.tsx	Replaced inline pagination with reusable Pagination component
src/pages/account.tsx	Replaced inline pagination with reusable Pagination component
src/helper/generalFunctions.ts	Added toFlatPropertyMap utility function for flattening nested objects
src/components/PageComponents/TransactionList.tsx	Added CSV export functionality with dropdown menu and query handling
src/components/General/Pagination.tsx	New reusable pagination component
package.json	Added papaparse CSV parsing library and its TypeScript types
package-lock.json	Updated dependencies for papaparse

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