2024 Upgrade to latest Android tools, gradle, jvm, Android studio

[gsantner]

⚠️ This issue respects the following points: ⚠️

• [X] This is a enhancement/feature request. Not a bug or question.
• [X] The topic is not already reported at Issues. (I've searched it).
• [X] Markor is up to date. See Releases for the latest version. Updates are available from F-Droid and GitHub.
• [X] The wanted feature/enhancement is not present in the latest development version (git master). (Please download and try the test version of Markor, named Marder. Don't worry; Markor and Marder appear as completely separate applications. You can install both side-by-side, and Markor's settings are not touched. If your desired feature is present, you don't need to open this issue. The change will be part of the next Markor update.)

Description

• Currently the project setup is from ~2022-2023, some newer Android Studio, Android SDK, Java versions might not work.
• Upgrade the project configuration to newer state.
• Also CI/CD (GitHub Actions) as consequence so CI succeeds
• At the release needs changes at F-Droid to enable newer SDK.
• Some feedback also is written here: https://github.com/gsantner/markor/discussions/2080

Information

App Version: v2.12.2

Source

git master branch

Format / File type

Not specific

Additional info / Log

-