[Proposal] : Multiple Owner Feature architecture.

proposals/multipleowner-project.md

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+| title | authors                                  | creation-date | last-updated |
+|-------|------------------------------------------|---------------|--------------|
+| Multiple owners feature | [@AryanBhokare](https://github.com/aryan-bhokare) | | |
+
+## Summary
+
+This proposal is for adding the multiple owners feature in the project management of litmus. Giving users a functionality to keep multiple owners in their project and decoupling the user creation and project creation.
+
+### Goals
+
+- Users can be invited with the role owner.
+- There can be multiple owners in one project.
+- Users can be created without any projects.
+- Users can create multiple projects.
+
+## Proposal
+
+### Flow Diagram
+![Flow](multipleprojectwoner.png)
+
+### Implementation Details
+
+The proposal suggests decoupling user login and project creation. We are going to support multiple owners and add APIs `Delete Project`: to delete the projects, `Update Role`: to update role of the user in the project. We will also support multiple projects under one user.