chore: add pre-issue requirements

Based on #1285

Author: iton0

.github/ISSUE_TEMPLATE/bug_report.md

@@ -9,6 +9,13 @@ assignees: ''
 
 <!-- Any bug report not following this template will be immediately closed. Thanks -->
 
+## Before Reporting an Issue
+- I have read the kickstart.nvim README.md.
+- I have read the appropiate plugin's documentation.
+- I have searched that this issue has not been reported before.
+
+- [ ] **By checking this, I confirm that the above steps are completed. I understand leaving this unchecked will result in this report being closed immediately.**
+
 ## Describe the bug
 <!-- A clear and concise description of what the bug is. -->
 
@@ -18,8 +25,8 @@ assignees: ''
 
 ## Desktop
 <!-- please complete the following information. -->
-- OS: 
-- Terminal: 
+- OS:
+- Terminal:
 
 ## Neovim Version
 <!-- Output of running `:version` from inside of neovim. -->