docs: Add a Design Doc blueprint.

This should be the template for all new Design Docs, minor deviations aside.
Hopefully this makes the process a bit easier.

docs/design_doc_blueprint.md

@@ -0,0 +1,56 @@
+# Title
+
+> A cool name for your Project
+
+Author: [Your-Name](mailto:[email protected])
+
+> If there are multiple authors, just list them all
+
+## Summary
+
+A short summary of your project/re-design/component and what problems it 
+addresses in about 3-10 sentences.
+
+## State of the Feature as of `$VERSION` (optional)
+
+The state of the feature you want to improve and where it currently falls 
+short. If there's nothing to compare to, leave it out.
+
+## Prior work (optional)
+
+Does this feature exist somewhere else and which tradeoffs it made. 
+
+> If there's no prior work, then use the related work section below.
+
+## Goals and non-goals
+
+Direct goals of the project and features deemed not worth pursuing.
+
+## Overview
+
+A detailed overview of the project and the improvements it brings.
+
+### Detailed Design
+
+The place to describe all new interfaces and interactions and how it plays into
+the existing code and behavior. This is the place for all nitty-gritty details 
+which interact with the system.
+
+## Alternatives considered (optional)
+
+Other alternatives to your suggested approach, and why they fall short.
+
+## Issues addressed (optional)
+
+A list of issues which are addressed by this design.
+
+## Related Work (optional)
+
+If there's a feature in another VCS which shares some similarities to your 
+proposed work, it belongs here. An example would be Jujutsu sparse workspaces 
+and Perforce client workspaces.
+
+## Future Possibilities
+
+The section for things which could be added to it or deemed out of scope during
+the discussion.

docs/design_docs.md

@@ -20,3 +20,9 @@ Jujutsu, you'll need to go through this process.
 
 
 [Rust RFCs]: https://github.com/rust-lang/rfcs 
+
+## Blueprint (Template)
+
+You can find the base template of a new Design Doc 
+[here](design_doc_blueprint.md).
+

mkdocs.yml

@@ -129,6 +129,7 @@ nav:
       - 'Guidelines and "How to...?"': 'contributing.md'
       - 'Code of conduct': 'code-of-conduct.md'
       - 'Design Docs': 'design_docs.md'
+      - 'Design Doc Blueprint': 'design_doc_blueprint.md'
 
 - 'Design docs': 
     - 'git-submodules': 'design/git-submodules.md'