feat(component): add ProgressIndicator

Closes #24

src/components/ProgressIndicator/ProgressIndicator.Story.svelte

@@ -0,0 +1,55 @@
+<script>
+  export let story = undefined;
+
+  import Layout from '../../internal/ui/Layout.svelte';
+  import ProgressIndicator from './ProgressIndicator.svelte';
+  import ProgressStep from './ProgressStep.svelte';
+  import ProgressIndicatorSkeleton from './ProgressIndicator.Skeleton.svelte';
+</script>
+
+<Layout>
+  <div>
+    {#if story === 'skeleton'}
+      <ProgressIndicatorSkeleton {...$$props} />
+    {:else if story === 'interactive'}
+      <ProgressIndicator {...$$props}>
+        <ProgressStep description="Step 1: Register a onChange event" let:props>
+          <div {...props}>Click me</div>
+        </ProgressStep>
+        <ProgressStep
+          label="Really long label"
+          description="The progress indicator will listen for clicks on the steps" />
+        <ProgressStep
+          label="Tooltip and really long label"
+          description="The progress indicator will listen for clicks on the steps" />
+      </ProgressIndicator>
+    {:else}
+      <ProgressIndicator {...$$props}>
+        <ProgressStep
+          label="First step"
+          description="Step 1: Getting started with Carbon Design System"
+          secondaryLabel="Optional label" />
+        <ProgressStep
+          label="Second step with tooltip"
+          description="Step 2: Getting started with Carbon Design System"
+          secondaryLabel="Optional label">
+          Label
+        </ProgressStep>
+        <ProgressStep
+          label="Third step with tooltip"
+          description="Step 3: Getting started with Carbon Design System">
+          Label
+        </ProgressStep>
+        <ProgressStep
+          label="Fourth step"
+          description="Step 4: Getting started with Carbon Design System"
+          invalid
+          secondaryLabel="Example invalid step" />
+        <ProgressStep
+          label="Fifth step"
+          description="Step 5: Getting started with Carbon Design System"
+          disabled />
+      </ProgressIndicator>
+    {/if}
+  </div>
+</Layout>