[Bug] Wizard allows creation of projects with invalid project names

[vatsashah45]

Current behavior

When using the Uno Wizard to create a new project, project names with the number.number pattern (for example, 6.3QA or 6.3Testing) are accepted.
The project is generated successfully, but it does not build, because dotnet/MSBuild does not allow project identifiers with a dot following a number.

Expected behavior

Uno Wizard should prevent project creation when the chosen name is invalid

Affected platforms

No response

Template Host

dotnet new, Visual Studio

Host OS

Windows

Template Options

Both the templates - Blank & Recommended

Template Version

"Uno.Sdk": "6.3.8"

Anything else we need to know?

No response

[agneszitte]

Related previous issue closed: https://github.com/unoplatform/uno.studio/issues/590

But this time, it is normally specific to project identifiers with a dot following a number for example, not supported by dotnet/MSBuild.

cc @jeromelaban, @nickrandolph, @MartinZikmund

[vatsashah45]

We probably should be preventing names with leading numbers as well as leading numbers after a .