[PLAY-1702] Circle Icon Button Kit: Add Target Prop (#4054)

Adds target prop for Circle Icon Button Kit. 

[[PLAY-1702]](https://runway.powerhrg.com/backlog_items/PLAY-1702)

#### Checklist:
- [x] **LABELS** Add a label: `enhancement`, `bug`, `improvement`, `new
kit`, `deprecated`, or `breaking`. See [Changelog &
Labels](https://github.com/powerhome/playbook/wiki/Changelog-&-Labels)
for details.
- [x] **DEPLOY** I have added the `milano` label to show I'm ready for a
review.

playbook/app/pb_kits/playbook/pb_circle_icon_button/_circle_icon_button.tsx

@@ -20,6 +20,7 @@ type CircleIconButtonProps = {
   onClick?: React.MouseEventHandler<HTMLElement>,
   newWindow?: boolean,
   type?: 'button' | 'submit' | 'reset' | undefined,
+  target?: string
   variant?: 'primary' | 'secondary' | 'link',
 }
 
@@ -36,6 +37,7 @@ const CircleIconButton = (props: CircleIconButtonProps): React.ReactElement => {
     loading = false,
     onClick = noop,
     type,
+    target,
     link,
     newWindow,
     variant,
@@ -66,6 +68,7 @@ const CircleIconButton = (props: CircleIconButtonProps): React.ReactElement => {
           loading={loading}
           newWindow={newWindow}
           onClick={onClick}
+          target={target}
           text={null}
           variant={variant}
       >

playbook/app/pb_kits/playbook/pb_circle_icon_button/circle_icon_button.html.erb

@@ -1,5 +1,5 @@
 <%= pb_content_tag do %>
-  <%= pb_rails("button", props: {type: object.type, loading: object.loading, link: object.link, new_window:object.new_window, variant: object.variant, disabled: object.disabled, dark: object.dark}) do %>
+  <%= pb_rails("button", props: {type: object.type, loading: object.loading, link: object.link, new_window:object.new_window, variant: object.variant, target: object.target, disabled: object.disabled, dark: object.dark}) do %>
     <%= pb_rails("icon", props: {icon: object.icon, fixed_width: true, dark: object.dark}) %>
   <% end %>
 <% end %>

playbook/app/pb_kits/playbook/pb_circle_icon_button/circle_icon_button.rb

@@ -17,6 +17,7 @@ class CircleIconButton < Playbook::KitBase
       prop :link
       prop :new_window, type: Playbook::Props::Boolean,
                         default: false
+      prop :target
       def classname
         generate_classname("pb_circle_icon_button_kit")
       end

playbook/app/pb_kits/playbook/pb_circle_icon_button/docs/_circle_icon_button_link.html.erb

@@ -10,3 +10,11 @@
   link: "https://google.com",
   new_window: true
 }) %>
+<br/>
+<%= pb_rails("circle_icon_button", props: {
+  icon: "info",
+  variant: "secondary",
+  aria: { label: "Link to Playbook in new window" },
+  link: "https://playbook.powerapp.cloud/",
+  target: "child"
+}) %>

playbook/app/pb_kits/playbook/pb_circle_icon_button/docs/_circle_icon_button_link.jsx

@@ -21,6 +21,15 @@ const CircleIconButtonLink = (props) => (
         {...props}
     />
 
+    <br/>
+
+    <CircleIconButton
+        aria={{ label: "Link to Playbook in new window" }}
+        icon="info"
+        link="https://playbook.powerapp.cloud/"
+        target="child"
+        variant="secondary"
+    />
   </div>
 )
 

playbook/app/pb_kits/playbook/pb_circle_icon_button/docs/_circle_icon_button_link.md

@@ -0,0 +1 @@
+The `link` prop accepts a string that is used as an href value and causes the button to act as a link. The default behavior of a link is to open in the current window. You can optionally alter the link behavior by adding the `newWindow` prop (boolean), which will open the link in a new window, or by calling the `target` prop, which accepts `_self`, `_blank`, `_parent`, `_top`, `child`, or any string, allowing you to specify any link target.