Document decision to forgo repo creation (#459)

* Document decision to forgo repo creation

doc/adr/0004-no-repo-creation.md

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+# 4. No repo creation
+
+Date: 2021-07-06
+
+## Status
+
+Proposed
+
+## Context
+
+In the initial pre-alpha version of weave-gitops and WKP, we created git repositories for the end-user.  However, we have encountered several environments where customers don't permit developers, application or platform SREs to create repositories in the customer's organization.  While repo creation is a convenient feature, we've decided the effort and support required are better focused elsewhere in the application.
+
+## Decision
+
+Weave gitops will require the user to have created the git repository on their Git server before running commands which need us to push changes to that repository.
+
+## Consequences
+
+The automated tests will set up repositories before executing weave-gitops operations against those repositories.