Feature/standardize export sheet name

[reilly-webster]

Companion to: pimcore/studio-backend-bundle#1867

This pull request adds support for specifying a custom sheet name when exporting data to XLSX files and updates related UI and backend logic. It also includes minor improvements to translation strings for consistency.

XLSX Export Enhancements:

• Added a new sheetName field to the XLSX export form, allowing users to specify the name of the sheet in the exported file (create-xlsx-form.tsx, XLSXFormValues) [1] [2].
• Updated the XLSX modal logic to initialize the sheetName field with a default value (Sheet1) and to pass this value through the export job and backend request (xlsx-modal.tsx) [1] [2] [3] [4].
• Added a translation key for the new sheet name field label (studio.en.yaml).

Translation and Formatting Improvements:

• Standardized the use of single quotes for YAML string values containing double quotes for better consistency and to avoid parsing issues (studio.en.yaml) [1] [2].## Changes in this pull request

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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