Format single item arrays as an array

[fflaten]

PR Summary

Single item arrays are currently printed as single item without type-specific formatting because Is-Value expands them. Arrays with a single string or bool (more types?) will not be properly formatted.

# Current
> Format-Nicely @('a')
a

# After
> Format-Nicely @('a')                
@('a')

Related #2329

PR Checklist

• PR has meaningful title
• Summary describes changes
• PR is ready to be merged
  • If not, use the arrow next to Create Pull Request to mark it as a draft. PR can be marked Ready for review when it's ready.
• Tests are added/update (if required)
• Documentation is updated/added (if required)

[fflaten]

Submitting as a draft because I'm not sure if this might format items in an unexpected array somewhere because Pester wraps input internally. The broken test is fixed by #2329

Alternative: Do extra checks inside if(Is-Value ...) { } to call Format-Bool, Format-String etc.

Thoughts @nohwnd ?

[nohwnd]

I will have a look will need to touch the formatting code for assert as well.

[nohwnd]

/backport to rel/5.x.x

[github-actions]

Started backporting to rel/5.x.x: https://github.com/pester/Pester/actions/runs/12678365405

[nohwnd]

**NOT real backport, ** sorry for spammin' you, testing backporting with new name format so automatic release notes don't have to be completely rewritten.

[nohwnd]

/backport to rel/5.x.x

[github-actions]

Started backporting to rel/5.x.x: https://github.com/pester/Pester/actions/runs/12678407713

[nohwnd]

/backport to rel/5.x.x

[github-actions]

Started backporting to rel/5.x.x: https://github.com/pester/Pester/actions/runs/12698585823