feat: rework rrfc template into rfc template

Author: nlf

.github/ISSUE_TEMPLATE/rfc.md

@@ -0,0 +1,40 @@
+---
+name: RFC
+about: Request For Comment
+title: '[RFC] <title>'
+assignees:
+labels:
+---
+
+<!--
+# Before Opening Please...
+- [ ] Search for an existing/duplicate RFC/ADR which might be relevant to your RFC
+-->
+## Motivation ("The Why")
+<!-- Examples
+Let us know why or how you thought of this idea. This should describe exactly
+what problem your suggestion is meant to solve.
+-->
+
+### Example Use Cases
+<!-- Examples
+An example or two of how your suggestion can be used.
+-->
+
+### Current Behaviour / Workarounds
+<!-- Examples
+Is there a way to achieve your suggestion today? How?
+-->
+
+#### Desired Behaviour
+<!-- Examples
+How would you like things to generally work to cover your situation/context?
+-->
+
+### References
+<!-- Examples
+* Related/Reference to #0
+* Depends on #0
+* Blocked by #0
+-->
+* n/a