Add FileUpload component

docs/routes/components/FileUpload.md

@@ -0,0 +1,31 @@
+### Single constrained example
+
+```svelte example raised column
+<script lang="ts">
+	import { Field, FileUpload } from 'omorphia'
+
+  let file: File
+</script>
+
+<Field label="Upload image">
+  <FileUpload accept="image/*" constrained bind:file />
+</Field>
+
+File name: {file?.name}
+```
+
+### Multiple example
+
+```svelte example raised column
+<script lang="ts">
+	import { Field, FileUpload } from 'omorphia'
+
+  let files: File[] = []
+</script>
+
+<Field label="Upload file">
+  <FileUpload accept="*" multiple bind:files />
+</Field>
+
+Count: {files.length}
+```