Ver 0.3.0

Full Changelog: v0.2.0...v0.3.0

• Build: introduced Gradle version catalog gradle/libs.versions.toml to centralize dependency versions across modules.
• Build: updated Gradle wrapper to 9.3.1 and OWASP dependency check plugin to 12.2.0.
• Build: bumped se.alipsa.nexus-release-plugin to 2.0.1 across modules.
• Console: moved implementation to se.alipsa.gi.console.InOut and left se.alipsa.gi.txt.InOut as a deprecated shim.
• Console: clipboard operations now log and no-op/return null when running headless.
• Console: chooseFile and chooseDir now return null when user enters empty input (cancellation).
• Console: fixed chooseDir prompt formatting to match chooseFile style.
• Logging: switched from direct SLF4J usage to se.alipsa.matrix.core.util.Logger for better script-friendly output.
• Swing: SVG display now uses matrix-charts ChartToSwing/SvgPanel, removing the Batik dependency.
• Swing: fixed IntelliJ type inference for extension filters and added empty-matrix handling.
• Swing: dialog methods (promptYearMonth, promptDate, promptSelect, promptPassword, prompt) now correctly return null when user cancels.
• Swing: changed .equals() to == for content type comparison (idiomatic Groovy).
• JavaFX: avoid deadlocks by running blocking dialogs/clipboard access directly on the FX thread and validate initial directories.
• JavaFX: guard empty grids in Viewer and return null for empty clipboard file lists.
• Common: content type detection now handles non-file classpath resources and added a test for classpath names.
• Common: FileTransferable.getTransferData() now validates the DataFlavor and throws UnsupportedFlavorException for unsupported flavors.
• Common: FileTransferable and ImageTransferable constructors now validate for null input.
• Common: promptSelect(String, Collection) now uses "Select" as title instead of duplicating the message.
• Common: removed dead/commented-out Flexmark code from AbstractInOut.
• Docs: added FX threading and chooser behavior notes in docs/API-Guide.md.