Move duplicate font definition code to common header file (tech dept)

[thoherr]

While implementing feature request #3284 i recognised that the definition of screen fonts is duplicated in several files, namely
src/graphics/Screen.cpp, src/modules/Telemetry/PowerTelemetry.cpp, src/modules/Telemetry/EnvironmentTelemetry.cpp, src/modules/CannedMessageModule.cpp.
To avoid breaking something, i even introduced another copy in src/modules/esp32/PaxcounterModule.cpp to implement the feature.

I propose to cleanup the duplicate code by moving it to a separate header file and indlude this in the files named above.

[thebentern]

Closed with #3302