build: add debian packaging files

[drlkf]

This pull request introduces debian packaging files. There are 2 most important items:

1. Icons and server download are added to the cmake build
2. An edge-case is introduced in the server load path to avoid putting a server.js in /usr/bin on debian package installs

I've added the instructions to build the package in the DEBIAN.md file, let me know if something is missing or unclear.

cheers

[drlkf]

Any chance we could get some attention to this?

[kzdnk]

I know very little of debian packaging, so I can't talk about correctness, but I tested this on bookworm and it seems to be working fine.

One thing I had to do, that is not mentioned, is to enable the non-free archive for libfdk-aac2.

[kzdnk]

Also, desktop entry is displayed with the default icon.

[drlkf]

Both should be fixed now

[vejeta]

I created debian packages for 4.4.169 version that are available in https://debian.vejeta.com

I created this Pull Request:
#455

with updated instructions on how to compile an use them.

Those packages has been submitted to the Debian project to be officially included on the Debian archives, and it is made made available on that unofficial repo on the interim.

I believe the pull request that I attach could make this pull request obsolete, please have a look and let me know what you think.

[drlkf]

Very nice.

Closing in favour of #455