Cleanup and improvements (#194)

- Lots of changes for migrating C code to C++
- Improved `Lockable` in several ways like adding `withLock()` (+ tests)
- Improved `Semaphore` a bit for improved readability, and also added some tests
- Upgrade Linux machine in GitHub Actions so that we can compile with a newer GCC
- Simplification of WiFi connection
- Updated funding options
- (and more)

TactilityCore/Source/CoreExtraDefines.h

@@ -1,37 +1,3 @@
 #pragma once
 
-/** Find the largest value
- * @param[in] a first value to compare
- * @param[in] b second value to compare
- * @return the largest value of a and b
- */
-#define TT_MAX(a, b)            \
-    ({                          \
-        __typeof__(a) _a = (a); \
-        __typeof__(b) _b = (b); \
-        _a > _b ? _a : _b;      \
-    })
-
-/** Find the smallest value
- * @param[in] a first value to compare
- * @param[in] b second value to compare
- * @return the smallest value of a and b
- */
-#define TT_MIN(a, b)            \
-    ({                          \
-        __typeof__(a) _a = (a); \
-        __typeof__(b) _b = (b); \
-        _a < _b ? _a : _b;      \
-    })
-
-/** @return the absolute value of the input */
-#define TT_ABS(a) ({ (a) < 0 ? -(a) : (a); })
-
-/** Clamp a value between a min and a max.
- * @param[in] x value to clamp
- * @param[in] upper upper bounds for x
- * @param[in] lower lower bounds for x
- */
-#define TT_CLAMP(x, upper, lower) (TT_MIN(upper, TT_MAX(x, lower)))
-
 #define TT_STRINGIFY(x) #x