Add packaging-changes.md (#376)

* Add packaging-changes.md

* Silke review

* Tracey review

* Remove "results" file that snuck in

* Silke review 2

docs/packaging/packaging-changes.md

@@ -0,0 +1,58 @@
+---
+title: Packaging Changes
+summary: Changes to packaging environment and instructions
+sidebar_position: 7
+---
+
+# Packaging Changes
+
+This page is meant to serve as a changelog of sorts for the Solus packaging environment and the packaging instructions. Refer to specific help pages for more details.
+
+- This list is not exhaustive
+- This list is in _reverse chronological order_ (newest first)
+
+## Upcoming
+
+_These items are not mandatory yet, and are subject to change_
+
+#### Requiring `homepage` in `package.yml`
+
+- The `homepage` key in `package.yml` will become mandatory. If a package does not have a homepage, use the address for the upstream source.
+- We are exploring how to enforce this; for now we will ask nicely.
+
+## 2023
+
+### September
+
+#### Switching From `make` to `go-task`
+
+- All packaging actions are now handled by `go-task` rather than `make`.
+  - Building a package can be done using `go-task` rather than `make`.
+  - Commands are the same: `make local`, for example, is replaced by `go-task local`.
+  - You can see all available commands by browsing to `Taskfile.ymml` in the `packages` repo at [`common/Taskfile.yml`](https://github.com/getsolus/packages/blob/main/common/Taskfile.yml).
+- Packagers should install `go-task` on their machines if they have not already.
+- The `Makefile` included with every package is no longer required. Please delete it from a package when updating, and do not include it when making the initial commit of a new package.
+
+#### GitHub Monorepo Migration
+
+- Packages were moved from the initial multirepo setup to the `packages` monorepo: [github.com/getsolus/packages](https://github.com/getsolus/packages) Now packagers only need to clone/fork one repository for all packages.
+- The recommended migration strategy is to fork this repository and start with a clean clone. Any local changes to packages should be moved over manually.
+- Packagers should now title commits like `packagename: Action`; for example: `nano: Update to 9.0`. Generic titles like `Update to 9.0` should not be used, except for rebuilds.
+- Packagers should use the pull request template for package updates, filling out the Summary and Test Plan sections as usual.
+
+### August
+
+#### Initial GitHub Migration from old Phabricator Dev Tracker
+
+- _This change was superseded by the later monorepo migration._
+- The new multirepo setup for packages was under `github.com/solus-packages` organization, packages were updated with PRs to individual repositories.
+- Issues were migrated to `github.com/getsolus/packages` from Phabricator. _Closed issues were not migrated._
+- A read-only instance of the old Dev Tracker is available at [phab.getsol.us](https://phab.getsol.us). _This will eventually be shut down._
+
+### April
+
+The repository index was moved to `cdn.getsol.us`.
+
+## 2022 and Earlier
+
+Not included in this list.