Add ability to add and remove shapes from drawing manager data source (…

…#110)

* Add Drawing Manager component that can be used to add or remove shapes from drawing manager datasource

* Add sample page for adding and removing shapes.

* Add tests for  DrawingManager.

Resolves #104 and #105 (#112)

* Resolves #105
Removing multiple markers only removes 1.

* fixes #104
updating marker options can't be used to make marker invisible (or un-draggable)

* Improve performance after many html marker add/remove operations.

* Fix linter warnings
using UpdateHtmlMarkersAsync() updates the options in stored in c# also. this didn't work:
var options = new AzureMapsControl.Components.Markers.HtmlMarkerOptions { Visible = !Marker.Options.Visible };

Resolves #104 and #105 (#112)

* Resolves #105
Removing multiple markers only removes 1.

* fixes #104
updating marker options can't be used to make marker invisible (or un-draggable)

* Improve performance after many html marker add/remove operations.

* Fix linter warnings
using UpdateHtmlMarkersAsync() updates the options in stored in c# also. this didn't work:
var options = new AzureMapsControl.Components.Markers.HtmlMarkerOptions { Visible = !Marker.Options.Visible };

Update csproj

Update csproj

Update csproj

Update csproj

Add PackageId

Temp removal of .net8

Simplify setup .net