Avatar Bloom View in home screen navigation bar (#1630)

* experimental code

* veyr close to a perfect solution but i need to make it crop

* code improvementds

* for now this looks like the best solution but there is a weird animation happening

* hard edge solution that completely works.

* dark mode support

* 17 support

* code improvement and dark mode improvement

* bloom gradient, it works but it needs a fix for landscape + the gradient should get hidden while in search mode

* hides when searching

* crash free constraint

* fixed everything only the scroll bar issue needs fixing now

* oblique gradient effect

* removed unused code

* removed unused code

* updated the bloom effects

* hairline restored for everything aside from the home screen

* code improvements

* possible final implementation

* pr suggestion

* hairline view added

* Update ElementX/Sources/Other/ScrollViewAdapter.swift

Co-authored-by: Doug <6060466+pixlwave@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Doug <6060466+pixlwave@users.noreply.github.com>

* code adjustments

* typo fix

* typo fix

---------

Co-authored-by: Doug <6060466+pixlwave@users.noreply.github.com>

ElementX/Sources/Other/ScrollViewAdapter.swift

@@ -49,11 +49,19 @@ class ScrollViewAdapter: NSObject, UIScrollViewDelegate {
             .eraseToAnyPublisher()
     }
     
+    private let isAtTopEdgeSubject: CurrentValueSubject<Bool, Never> = .init(false)
+    var isAtTopEdge: CurrentValuePublisher<Bool, Never> {
+        isAtTopEdgeSubject
+            .asCurrentValuePublisher()
+    }
+    
     // MARK: - UIScrollViewDelegate
     
     func scrollViewDidScroll(_ scrollView: UIScrollView) {
         didScrollSubject.send(())
         updateScrollDirection(scrollView)
+        let insetContentOffset = scrollView.contentOffset.y + scrollView.contentInset.top
+        isAtTopEdgeSubject.send(insetContentOffset >= 3)
     }
     
     func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {