C++ conversion (#80)

Converted project to C++

Documentation/project-structure.puml

@@ -0,0 +1,23 @@
+@startuml
+skinparam componentStyle uml1
+
+[Tactility] as t
+note right of t : to build and use graphical apps
+[TactilityHeadless] as theadless
+note right of theadless : to build and use background services
+[TactilityCore] as tcore
+note right of tcore : defines, data types, logging, async, etc.
+
+package "Applications" {
+  [AppSim] as appsim
+  [AppEsp32] as appesp
+}
+
+note right of appesp : AppEsp depends on the board \n projects for configuration
+
+[t] ..> [theadless]
+[theadless] ..> [tcore]
+[appsim] ..> [t]
+[appesp] ..> [t]
+
+@enduml