Remove explicit default destructors (#157)

From CppCoreGuidelines:

Rule of Zero: C.20: If you can avoid defining default operations, do.
C.52: Use inheriting constructors to import constructors into a derived class that does not need further explicit initialization.
DRY forward and using declarations.
Miscellaneous:

Fix format.sh to output examples with normalised paths in sorted order.

Co-authored-by: ArthurSonzogni <sonzogniarthur@gmail.com>

include/ftxui/component/captured_mouse.hpp

@@ -6,7 +6,7 @@
 namespace ftxui {
 class CapturedMouseInterface {
  public:
-  virtual ~CapturedMouseInterface() {}
+  virtual ~CapturedMouseInterface() = default;
 };
 using CapturedMouse = std::unique_ptr<CapturedMouseInterface>;
 }  // namespace ftxui