* maint(build): remove legacy GNU Make build system support

* maint(example): move the example so that component manager finds it

* maint(example): specify component dependency

* maint(build): clean up legacy 'register_component' usage

* maint(build): specify more fields in component manifest

* doc(readme): simplify installation instructions

See https://github.com/espressif/esp32-camera/issues/596

* maint(ci): remove tests for EOL versions (v4.1, v4.2)

* fix(build): add missing transitive dependency on driver component