Inconsistency: some expressions use splat operator instead of array

[fain182]

Problem

Some Expression classes in src/Expression/ForClasses/ accept multiple values via splat operator (string ...$args), while others use array.

This inconsistency was first noted by @hgraca in #403.

Classes using splat operator (6)

• Extend
• NotExtend
• ResideInOneOfTheseNamespaces
• ResideInOneOfTheseNamespacesExactly
• NotResideInOneOfTheseNamespacesExactly
• NotResideInTheseNamespaces

Classes already using array (3)

• DependsOnlyOnTheseNamespaces
• NotDependsOnTheseNamespaces
• MatchOneOfTheseNames

Why this is a problem

The codebase is inconsistent: similar expressions use different conventions for accepting multiple values.

Beyond inconsistency, the splat operator also limits future evolution — since variadic parameters must always be last, it is impossible to add a second constructor parameter without a breaking change.

Proposed solution

Standardize all expressions to use array instead of the splat operator.