Dependency upgrades, under-the-hood changes

[HLCaptain]

This is a maintenance release, but a lot have happened in 1 year and I had to make a lot of modifications.

• Upgraded Gradle to 9.0.0
• Upgraded Kotlin to 2.2.0
• Now using kotlin.time and kotlin.datetime where possible instead of Java alternatives.
• Removed ConstraindLayout as it was buggy.
• Removed Material 2 dependencies in most places (Bottom Sheet).
• Upgraded Compose Destinations navigation system to 2.x.

[Copilot]

Pull Request Overview

This is a maintenance release upgrading the project's dependencies and migrating to modern Kotlin time APIs. The PR includes major upgrades to Gradle (8.9 → 9.0.0), Kotlin (2.0.0 → 2.2.0), and numerous other dependencies, while migrating from Java time classes to Kotlin's native time and datetime libraries throughout the codebase.

• Upgraded core infrastructure (Gradle, Kotlin, AGP) to latest versions
• Migrated from Java time classes to Kotlin time/datetime APIs
• Updated Compose Destinations navigation from 1.x to 2.x
• Removed deprecated Material 2 and ConstraintLayout dependencies

Reviewed Changes

Copilot reviewed 63 out of 64 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
settings.gradle.kts	Added Gradle toolchains plugin for JVM management
gradle/wrapper/gradle-wrapper.properties	Updated to Gradle 9.0.0
gradle/libs.versions.toml	Major dependency version updates across all libraries
Multiple UI/domain files	Migrated from ZonedDateTime to Kotlin Instant/LocalDateTime
Navigation files	Updated to Compose Destinations 2.x syntax
Theme files	Removed Material 2 dependencies and updated theming