fix a crash issue and update sdk version

[waertf]

PR Checklist:

• [o ] I have tested this extensively and it does not break any existing behavior.
• [ o] I have added/updated examples and tests for any new behavior.
• [ o] If this is a significant change, an issue has already been created where the problem / solution was discussed: [N/A, or add link to issue here]

PR Description

Fix null pointer exception in draw markers after real time highlighted chart disappear update compileSdkVersion to 33 and gradle version to 7.2 add MPChartLib binary release update read me setup for Lib binary Setup

[waertf]

reformat as hannesa2 suggested

[hannesa2]

merged in https://github.com/AppDevNext/AndroidChart/pull/100