Add Lint rule issue template

.github/ISSUE_TEMPLATE/lint-rule.md

@@ -0,0 +1,20 @@
+---
+name: Lint Rule
+about: Suggest adding a lint rule for style or security
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Name**
+If you've thought of one, suggest a short name that gives a good hint about the purpose of the rule. Multiple words must be separated by hyphen. Avoid a name with more than 4 words.
+
+**Problem**
+The problem you faced while writing/analysing the code.
+
+**Description**
+What should the rule do, i.e., **how** should it solve the problem you faced?
+
+**Priority**
+If you'd like to, you can indicate the priority of this rule for your organisation. Priority can be `High` (meaning the rule will be a massive improvement for your workflow), `Medium` or `Low`.