Add ResideInNamespaceOrBelow and Its Negated Variants

[StefanGreve]

Motivation

In one of my projects, an architecture test restricts the visibility of everything in a Model namespace and its sub-namespaces. With the current API, the rule has to name each namespace (MyProject.Model and MyProject.Model.Options, joined by Or), so a sub-namespace added later escapes the rule silently instead of failing it. ResideInNamespaceMatching can work around this with a regular expression, but at the cost of the readability a fluent API normally provides.

Feature Description

Add ResideInNamespaceOrBelow and NotResideInNamespaceOrBelow to TypeConditionsDefinition, ResideInNamespaceOrBelow and DoNotResideInNamespaceOrBelow to TypePredicatesDefinition, and the matching methods in AddTypeCondition/AddTypePredicate, mirroring ResideInNamespace and NotResideInNamespace/DoNotResideInNamespace.

A namespace matches when its full name equals the given name or starts with it followed by a dot, compared case-insensitively like ResideInNamespace, so Foo.Bar matches Foo.Bar and Foo.Bar.Baz but not Foo.BarBaz:

Types().That().ResideInNamespaceOrBelow("Foo.Bar").Should().NotBePublic()

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.55%. Comparing base (dc9f1a9) to head (7e96181).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #511      +/-   ##
==========================================
+ Coverage   86.51%   86.55%   +0.04%     
==========================================
  Files         261      261              
  Lines       12610    12648      +38     
  Branches     1233     1236       +3     
==========================================
+ Hits        10909    10947      +38     
  Misses       1359     1359              
  Partials      342      342              

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