Add battery information and sensor plot metadata

Contents (#19)

Enhancements

• Make battery information available in information sensors tab and warn if data limit has been applied to it
• Add sensor metadata to plots

Operations

• Use octue/generate-pull-request-description and octue/check-semantic-version GitHub actions

Dependencies

• Use latest aerosense-tools version

Refactoring

• Simplify app definition
• Move app.py into dashboard package
• Rename "connection statistics" to "information sensors"
• Move callbacks into separate module