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>

src/ftxui/component/input.cpp

@@ -24,7 +24,6 @@ class InputBase : public ComponentBase {
             ConstStringRef placeholder,
             Ref<InputOption> option)
       : content_(content), placeholder_(placeholder), option_(option) {}
-  ~InputBase() override = default;
 
   int& cursor_position() { return *(option_->cursor_position); }