Prepare version 1.1.2

[valepakh]

Prepares the 1.1.2 release per RELEASING.md:

• Bump VERSION_NAME in gradle.properties to 1.1.2.
• Promote Unreleased to [1.1.2] - 2026-05-19 in CHANGELOG.md, add new empty Unreleased, add reference link, update compare URL.
• Bump Maven coordinate in README.md Download section to 1.1.2.

Changes captured in the 1.1.2 changelog entry:

• Fix: Render cells containing CRLF (\r\n) line endings correctly. (Fix CRLF cell rendering #94)
• Build: Update Gradle to 9.5.1. (Update Gradle to v9.5.0 #95, Update Gradle to v9.5.1 #96)
• Snapshots now publish to the Central Portal Snapshots repository. (Migrate to Sonatype Central Portal #67)