Adopt Compound Colours (#1086)

* Delete deprecated font tokens.

* Migrate from primaryContent to textPrimary/iconPrimary.

* Migrate from links to textLinkExternal.

* Migrate from secondaryContent to textSecondary/iconSecondary.

* Migrate from accent to textActionPrimary.

- Some uses changed to textPrimary or iconPrimary as necessary.
- Some manual tints removed now that that Sentry is fixed.

* Migrate alert to textCriticalPrimary/iconCriticalPrimary.

* Migrate from brand to textActionAccent/iconAccentTertiary.

* Migrate from background to bgCanvasDefault or text/iconOnSolidPrimary

* Migrate system to bgSubtleSecondary.

* Remove ElementUIColors and obsolete migrated colours.

* Migrate tertiaryContent/quaternaryContent/quinaryContent to Compound.

* Migrate bubblesYou/bubblesNotYou to use Compound.

* Update Compound.

ElementX/Sources/Other/MapLibre/LocationAnnotation.swift

@@ -73,7 +73,7 @@ class LocationAnnotationView: MGLUserLocationAnnotationView {
     private func addUserView() {
         guard let pinView = UIHostingController(rootView: Image(systemName: "circle.fill")
             .resizable()
-            .foregroundColor(.element.accent)).view else {
+            .foregroundColor(.compound.iconPrimary)).view else {
             return
         }
         
@@ -83,7 +83,7 @@ class LocationAnnotationView: MGLUserLocationAnnotationView {
     private func addPinView() {
         guard let pinView = UIHostingController(rootView: Image(systemName: "mappin")
             .resizable()
-            .foregroundColor(.element.accent)).view else {
+            .foregroundColor(.compound.iconPrimary)).view else {
             return
         }