export feature for tracks and booths are done

app/views/admin/booths/_all_booths.xlsx.axlsx

@@ -0,0 +1,27 @@
+wb.add_worksheet(name: 'all booths') do |sheet|
+  bold_style = wb.styles.add_style(b: true)
+  wrap_text = wb.styles.add_style alignment: {wrap_text: true}
+  row = ['Booth ID',
+         'Title',
+         'Description',
+         'Reasoning',
+         'Submitter Name',
+         'Submitter Relationship',
+         'Website Url',
+         'State']
+
+  sheet.add_row row, style: bold_style
+  @booths.each do |booth|
+    row = []
+    row << booth.id
+    row << booth.title
+    row << booth.description
+    row << booth.reasoning
+    row << booth.submitter.name
+    row << booth.submitter_relationship
+    row << booth.website_url
+    row << booth.state
+    sheet.add_row row , style: wrap_text
+    sheet.column_widths 10,20,35,35,20,30,35,10
+  end
+end