Fix escaping in npm scripts in package.json

[Steve-Mcl]

Description

This pull request makes minor updates to the package.json scripts for consistency. The main change is switching single quotes to double quotes around glob patterns and paths in several npm scripts. This helps ensure cross-platform compatibility, especially for Windows environments.

Most important changes:

Script command consistency and compatibility:

• Changed single quotes to double quotes in the test:unit:forge and test:system script glob patterns to improve compatibility across different shells and operating systems.

Related Issue(s)

closes #7770

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production
• Link to Changelog Entry PR, or note why one is not needed.

Labels

• Includes a DB migration? -> add the area:migration label