Introduce design docs

Author: polldo

designs/0000-template.md

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+# replace this with a descriptive title for the RFC
+
+## Overview
+
+## Problem
+
+## Constraints
+
+## Recommended Solution
+
+<!-- Title of the solution from the "Solutions" section you are recommending. -->
+
+## Solutions
+
+<!-- Make a copy of the subsections below for each of the solutions that were considered. -->
+
+### replace this with a descriptive title for the solution
+
+#### Strengths
+
+<!-- List strengths of this solution. -->
+
+-
+
+#### Weaknesses
+
+<!-- List weaknesses of this solution. -->
+
+-
+
+## Open Questions
+
+## Appendix
+
+<!-- Provide links to any relevant information. -->