samples for CharSequence.toContain...value

[robstoll]

Code related feature

Following the things you need to do:

api-fluent

• add a value method in CharSequenceToContainCreatorsSamples for toContain....value(...) => already done
• add a valueIgnoringCase method in CharSequenceToContainCreatorsSamples toContain.ignoringCase.value(...)
• add a valueIgnoringCaseWithChecker method in CharSequenceToContainCreatorsSamples for toContain.ignoringCase...value(...)
• link in the KDoc of the corresponding functions in charSequenceToContainCreators.kt to the sample via @sample (see function value in this file)

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[Nikos-Tsiougranas]

I will work on this!