feat: add Kotlin support module and clarify 1.1.0 docs

[JunggiKim]

Summary

• add the optional Kotlin/JVM support module and collection ergonomics changes currently on local main
• clarify Java-only vs Kotlin/JVM installation and dependency expectations
• bump the local version line and changelog to 1.1.0

Verification

• reviewed source, publication metadata, and README consistency
• runtime Gradle verification remains limited by local network restrictions for wrapper download

[gitguardian]

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GitGuardian id	GitGuardian status	Secret	Commit	Filename
28257257	Triggered	JSON Web Token	cd94a4d	java-refined-kotlin/src/test/kotlin/io/github/junggikim/refined/kotlin/ScalarKotlinExtensionsTest.kt	View secret

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