rfc: switch to github for rfc review

Author: zkat

_pages/rfc-move-rfc-process-to-pr.md

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+---
+layout: pageminimal
+title: "RFC - Use Github PRs for RFC Review"
+permalink: /rfc-move-rfc-process-to-prs
+---
+
+# RFC - Use Github PRs for RFC Review
+
+Slack posts are nice for some types of documents, but for things that need an actual review process, Github's Pull Request feature is a much better fit.
+
+As such, this RFC proposes that the process be moved to Github.
+
+## Proposed changes
+
+* Change any mention of Slack posts for review use in https://wealljs.org/rfc-process to refer to Github PRs instead.
+* Specify that at least one WeAllJS admin should be marked as a reviewer for the PR, along with any other users who would like to be included in its review.
+* Remove all pinned RFC documents from `#meta` (since they're on the site now)