Add ISSUE_TEMPLATE.md

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,29 @@
+<!-- Check all that apply [x] -->
+- Category
+    - [ ] Question
+    - [ ] Bug
+    - [ ] Suggestion
+- OS
+    - [ ] Linux
+    - [ ] Mac OS X
+    - [ ] Windows
+    - [ ] Etc.
+- Vim
+    - [ ] Vim
+    - [ ] Neovim
+
+<!--
+
+Before submitting
+=================
+
+- Make sure that you have the latest version of fzf and fzf.vim
+- Check if your problem is reproducible with a minimal configuration
+
+Start Vim with a minimal configuration
+======================================
+
+vim -Nu <(curl https://gist.githubusercontent.com/junegunn/6936bf79fedd3a079aeb1dd2f3c81ef5/raw/vimrc)
+
+-->
+