chore: create pull request template (#259)

.github/ISSUE_TEMPLATE/bug_report.md

@@ -8,10 +8,13 @@ assignees: ''
 ---
 
 **Bug detail**
+
 Name of the file in which the bug is present. Additionally you can also add the line number and/or a code snippet of the bug.
 
 **Counter example**
+
 Give an example for which the algorithm implementation doesn't produce the expected output. Also give the expected output if possible.
 
 **Additional context**
+
 Add any other context about the problem here.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,23 @@
+<!--
+Please make sure to read the Contribution Guidelines:
+-->
+
+<!-- PULL REQUEST TEMPLATE -->
+<!-- (Update "[ ]" to "[x]" to check a box) -->
+
+**What kind of change does this PR introduce?** (check at least one)
+
+- [ ] Bugfix
+- [ ] New algorithm
+- [ ] Optimization in previous algorithms
+- [ ] Code style update
+- [ ] Refactor
+- [ ] Documentation
+- [ ] Other, please describe:
+
+**Briefly describe the changes in this PR**
+
+<!-- For example you can add algorithm name, language used to implement it and link to online implementation of it -->
+
+**Other information:**
+<!-- Add any additional info you want here -->