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

TactilityKernel/Include/Tactility/Driver.h

@@ -0,0 +1,50 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdbool.h>
+
+struct Device;
+struct DeviceType;
+
+struct Driver {
+    /** The driver name */
+    const char* name;
+    /** Array of const char*, terminated by NULL */
+    const char**compatible;
+    /** Function to initialize the driver for a device */
+    int (*start_device)(struct Device* dev);
+    /** Function to deinitialize the driver for a device */
+    int (*stop_device)(struct Device* dev);
+    /** Contains the driver's functions */
+    const void* api;
+    /** Which type of devices this driver creates (can be NULL) */
+    const struct DeviceType* device_type;
+    /** Internal data */
+    struct {
+        /** Contains private data */
+        void* data;
+    } internal;
+};
+
+int driver_construct(struct Driver* driver);
+
+int driver_destruct(struct Driver* driver);
+
+int driver_bind(struct Driver* driver, struct Device* device);
+
+int driver_unbind(struct Driver* driver, struct Device* device);
+
+bool driver_is_compatible(struct Driver* driver, const char* compatible);
+
+struct Driver* driver_find_compatible(const char* compatible);
+
+static inline const struct DeviceType* driver_get_device_type(struct Driver* driver) {
+    return driver->device_type;
+}
+
+#ifdef __cplusplus
+}
+#endif