Create Release 0.3

[hajoha]

Added

• Github Action Workflow for APK Debug/Relase Build and SPDX File
• Documentation
• About page shows now version, git hash, build variant and signature hash

Changed

• Fix possible InfluxDB Bug
• iPerf3 GUI

Chore

• Updated org.spdx.sbom to 0.8.0
• Updated androidx.appcompat:appcompat to 1.7.0
• Updated androidx.concurrent:concurrent-futures to 1.2.0
• Updated androidx.fragment:fragment to 1.8.0
• Updated androidx.appcompat:appcompat to 1.7.0
• Updated com.google.android.material:material to 1.12.0
• Updated com.influxdb:influxdb-client-java to 7.1.0
• Updated com.google.android.gms:play-services-location to 21.3.0
• Updated androidx.viewpager2:viewpager2 to 1.1.0
• Updated gradle to 8.8
• Updated com.android.tools.build:gradle to 8.4.2

Breaking Changes

• see PR 14

[PeterHasse]

LGTM

[PeterHasse]

LGTM