Add "Test scenario request" issue template

.github/ISSUE_TEMPLATE/test-scenario-request.md

@@ -0,0 +1,32 @@
+---
+name: Test scenario request
+about: Suggest a test scenario for Project Oni to consider
+title: "[test request] "
+labels: hint/needs-analysis, hint/needs-triage, kind/test-scenario
+assignees: raulk
+
+---
+
+**What would you like us to test?**
+
+<-- A clear and concise description of what the test scenario looks like, e.g. I'd like you to test that/if/how [...] -->
+
+**Technical implementation details.**
+
+<-- Provide any technical insight that would help us implement such scenario. Think about the setup, choreography between nodes, operations involved, etc. -->
+
+**What should we measure?**
+
+<-- Test scenarios are behaviours we orchestrate. In most cases, you'll want measurements captured. What would those be? -->
+
+**Which components are involved?**
+
+<-- Enumerate the Filecoin system components that are involved in this test scenario. Feel free to provide further details. -->
+
+**On a scale from 0-10, what's the proposed _**discomfort factor**_? In other words, how uncomfortable would you be if we went live **without** having tested this? Explain why.**
+
+<-- 8. Because... -->
+
+**Additional remarks.**
+
+<-- Anything else that Project Oni should know. -->