Implemented TactilityKernel and DevicetreeCompiler, updated licenses & copyrights (#452)

**New features**

- Created a devicetree DTS and YAML parser in Python
- Created new modules:
  - TactilityKernel (LGPL v3.0 license)
  - Platforms/PlatformEsp32 (LGPL v3.0 license) 
  - Platforms/PlatformPosix (LGPL v3.0 license)
  - Tests/TactilityKernelTests

Most boards have a placeholder DTS file, while T-Lora Pager has a few devices attached.

**Licenses**

Clarified licenses and copyrights better.

- Add explanation about the intent behind them.
- Added explanation about licenses for past and future subprojects
- Added more details explanations with regards to the logo usage
- Copied licenses to subprojects to make it more explicit

Tests/TactilityKernel/CMakeLists.txt

@@ -0,0 +1,14 @@
+project(TactilityCoreTests)
+
+enable_language(C CXX ASM)
+
+set(CMAKE_CXX_COMPILER g++)
+
+file(GLOB_RECURSE TEST_SOURCES ${PROJECT_SOURCE_DIR}/*.cpp)
+add_executable(TactilityKernelTests EXCLUDE_FROM_ALL ${TEST_SOURCES})
+
+target_include_directories(TactilityKernelTests PRIVATE ${DOCTESTINC})
+
+add_test(NAME TactilityKernelTests COMMAND TactilityKernelTests)
+
+target_link_libraries(TactilityKernelTests PUBLIC TactilityKernel)