winget: Fix winget meson installation

[RytoEX]

Description

Fix winget meson installation. Without this change, meson will not be installed automatically via winget. Can change the first commit prefix to utils.pwsh if preferred, since it also modifies a file there.

A second commit changes the syntax for .Wingetfile so that it is uniform for all entries.

Motivation and Context

Pointed out on #277. Further investigation showed that this does indeed fail if meson cannot be found with Get-Command.

How Has This Been Tested?

Tested locally on Windows 11.

Types of changes

• Bug fix (non-breaking change which fixes an issue)

• Code cleanup (non-breaking change which makes code smaller or more readable)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[RytoEX]

Hmm. Odd that the WoA builds failed with this change. Will have to investigate further.

[PatTheMav]

Syntactically it should still be package <id>[, path: <path>[, bin: <binary>]], as the package keyword starts a package declaration, whereas path or bin are attributes.