Migrate all Examples and other sample mode to Swift 6 language mode

[czechboy0]

Motivation

Now that Swift 6 language mode has been released as part of the Swift 6.0 toolchain, we should bump the tools version of all our Examples and sample code.

Proposed solution

Bump swift-tools-version in the Package.swift files of the examples to 6.0 and make sure they all still build without warnings.

Alternatives considered

No response

Additional information

No response