fix: Hide status bar on fullscreen android

fix fullscreenEnabled not effective

fix : first ios build not working properly

fix : [Android] Double touch issue

When I first build IOS, it doesn't build as intended.

fix : markerDetected not working properly

fix: borderRadius and clipper can't be both null

Resolves the issue of adding code duplication when doing Flutter build Append

In `ClipRRect` constructor, `borderRadius` and `clipper` are asserted
that they shouldn't be nul...

Fix: (Android) issues-429-hide-status-bar

null-safe support

documentation improved

Add mention to PiotrxKolasinski, remove typos

Fixing project not compiling

Fix for unityDidUnload callback not firing

Removed register-unregister mismatch and removed duplicate calls

about not support iOS simulator

Adds a troubleshooting section and removes the installing section.

Refer to: Does it support iOS simulator? #76

Made the unityDidUnload callback available to obj-c and conform to the expected swift signature,...

Fixing project not compiling though to not overriding class member properly.

[flutter] fixed issues gesture recogniser being null

[docs]: updated README.md

[flutter]: optional support for androidview

[chore]: update readme and unity package path

Update README.md

fix spelling mistake, tell user of import statement, fix indenting