Add documentation about our release process (#1159)

* Add documentation about our release process

* Fixes

* Add company-related tasks, enable back WIP pages

* Fix WIP links

* Add AOSC OS

* Add WIP for AOSC OS

* Tweak

* Remove maintainers email IDs

* Use GH nicknames

* Remove useless WIP for brew

* Tweaks

docs/packaging/linux-debian/README.md

@@ -0,0 +1,29 @@
+# HTTPie on Debian, Ubuntu, and derived
+
+Welcome to the documentation about **packaging HTTPie for Debian GNU/Linux**.
+
+- If you do not know HTTPie, have a look [here](https://httpie.io/cli).
+- If you are looking for HTTPie installation or upgrade instructions on Debian GNU/Linux, then you can find them on [that page](https://httpie.io/docs#debian-and-ubuntu).
+- If you are looking for technical information about the HTTPie packaging on Debian GNU/Linux, then you are in a good place.
+
+## About
+
+This document contains technical details, where we describe how to create a patch for the latest HTTPie version for Debian GNU/Linux. They apply to Ubuntu as well, and any Debian-derived distributions like MX Linux, Linux Mint, deepin, Pop!_OS, KDE neon, Zorin OS, elementary OS, Kubuntu, Devuan, Linux Lite, Peppermint OS, Lubuntu, antiX, Xubuntu, etc.
+We will discuss setting up the environment, installing development tools, installing and testing changes before submitting a patch downstream.
+
+The current maintainer is Bartosz Fenski.
+
+## Overall process
+
+Open a new bug on the Debian Bug Tracking System by sending an email:
+
+- To: `Debian Bug Tracking System <submit@bugs.debian.org>`
+- Subject: `httpie: Version XXX available`
+- Message template ([example](https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993937)):
+
+  ```email
+  Package: httpie
+  Severity: wishlist
+
+  <MESSAGE>
+  ```