[Phase-24]Add csv export

app/views/glossary_terms/index.csv.ruby

@@ -0,0 +1,19 @@
+require 'csv'
+
+CSV.generate(row_sep: "\r\n", encoding: "CP932") do |csv|
+  column_names =   ["name", "name_en", "category", "datatype", "codename", "description", "rubi", "abbr_whole"]
+  csv << column_names
+  @glossary_terms.each do |term|
+    column_values = [
+        term.name,
+        term.name_en,
+        term.category&.name,
+        term.datatype,
+        term.codename,
+        term.description,
+        term.rubi,
+        term.abbr_whole
+    ]
+    csv << column_values
+  end
+end

app/views/glossary_terms/index.html.erb

@@ -23,4 +23,6 @@
   <%= render 'index_terms', terms: @glossary_terms %>
 <% end %>
 
-
+<% other_formats_links do |f| %>
+  <%= f.link_to_with_query_parameters 'CSV' %>
+<% end %>