Build improvements and AppImage/deb distributions packages

[stdevPavelmc]

This is related to #563, it covers:

• Automated testing on Github actions (push to any branch but master)
• Automated builds on Github actions (only on push/merge to master branch)
• Full docker support for all the targets
• Automated generation of .deb and .AppImage packages
• Multiarch builds (to generate arm packages, Pending...)

Notes:

• AppImage get MariaDB and Hamlib 4.5.5 included on the package for full portability, you only need support for libfuse2 on the host target to make it work
• Two AppImage packages are built, one for GTK2 and the other for QT5
• The deb packages are generated unsigned as they are ffor testing purposes

[stdevPavelmc]

This PR is a Work in progress as there are new things to consider:

• Draft releases on merge to master branch, using artifacts produced in this step (see https://trstringer.com/github-actions-create-release-upload-artifacts/)
• Multi-arch builds to generate arm deb/AppImage packages

[stdevPavelmc]

Progress

Sample images of a draft release:

Note how the Github Actions build the AppImages and deb for us and also add the latest version changes on the CHANGELOG file

Also, note that the list is separated via bullet grouping (+, -, *) for better rendering

[stdevPavelmc]

In this way we can automate the builds and releases.

Questions for @ok2cqr:

Is there any convention on the generation of the /src/changelog.html? why?

I see two points of updates, the CHANGELOG on the root folder and then the one in /src/changelog.html, for humans is easier/simpler to use markdown (CHANGELOG) so I can make a script to generate the /src/changelog.html from the markdown version and add it to the build steps for automation, in this way we have only one point of modification for the changelogs

I will try it and will add it here, also merging the two versions that i see has a difference

[ok2cqr]

Thank you for excellent work! Could you fix the conflicts, please? I'd like to merge your changes.

About the changelog. The html version may be different from CHANGELOG file. The idea was to have a separate changelog more readable for cqrlog users.

[alphafox02]

I was able to use this PR and build a working APPIMAGE using 22.04. Tested on another 22.04 machine with existing repo installed maridb/mysql resulting in a successful connection to the database.