Add Debian package registry (#24426)

Co-authored-by: @awkwardbunny

This PR adds a Debian package registry.
You can follow [this
tutorial](https://www.baeldung.com/linux/create-debian-package) to build
a *.deb package for testing.
Source packages are not supported at the moment and I did not find
documentation of the architecture "all" and how these packages should be
treated.


![grafik](https://user-images.githubusercontent.com/1666336/218126879-eb80a866-775c-4c8e-8529-5797203a64e6.png)

Part of #20751.

Revised copy of #22854.

---------

Co-authored-by: Brian Hong <brian@hongs.me>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: Giteabot <teabot@gitea.io>

go.mod

@@ -17,6 +17,7 @@ require (
 	github.com/NYTimes/gziphandler v1.1.1
 	github.com/PuerkitoBio/goquery v1.8.0
 	github.com/alecthomas/chroma/v2 v2.5.0
+	github.com/blakesmith/ar v0.0.0-20190502131153-809d4375e1fb
 	github.com/blevesearch/bleve/v2 v2.3.6
 	github.com/bufbuild/connect-go v1.3.1
 	github.com/buildkite/terminal-to-html/v3 v3.7.0
@@ -96,6 +97,7 @@ require (
 	github.com/stretchr/testify v1.8.1
 	github.com/syndtr/goleveldb v1.0.0
 	github.com/tstranex/u2f v1.0.0
+	github.com/ulikunitz/xz v0.5.11
 	github.com/urfave/cli v1.22.12
 	github.com/xanzy/go-gitlab v0.80.2
 	github.com/xeipuuv/gojsonschema v1.2.0
@@ -260,7 +262,6 @@ require (
 	github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf // indirect
 	github.com/subosito/gotenv v1.4.1 // indirect
 	github.com/toqueteos/webbrowser v1.2.0 // indirect
-	github.com/ulikunitz/xz v0.5.11 // indirect
 	github.com/unknwon/com v1.0.1 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasthttp v1.44.0 // indirect