Fix file extension in Protel-style Gerber output job

The Protel-style suffix for the board outlines layer was "gml" instead
of "gm1".

Refactor format_code.sh and add QML formatter

Co-authored by ubruhin

devtools: Install qmlformat in Docker image

devtools: Update to clang-format 15.0.7

OpenGlView: Factor out shader programs into files

Instead of hardcoding OpenGl shader programs as strings, now storing
them in files loaded at run...

Fix part attributes not substituted in board editor

* Change color for documentation layer

The color of Documentation layer has not been visually...

Check pointers before accessing them, since there seems to be a case
which leads to a nullpointe...

CI: Update to macOS 12

It seems for macOS 11 the qt5 bottle (binary release) suddenly
disappeared.

Homebrew upgrade currently takes several hours. Usually I would think
"WTF?!" but I learned rand...

AUTHORS.md: Update list of contributors

Generated by script.

Make list_tests.py callable from within subfolder

Fix possibly broken STEP files after minification

CI: Update to latest Docker images

Board editor: Fix highlighting pads while drawing traces

Pads of the same net were not highlighted while drawing traces in
the board editor.

3D view: Fix location and color of some STEP solids

CLI: Implement new command 'open-step'

Show OpenCascade version in about dialog

Improve metainfo file

Cf. https://freedesktop.org/software/appstream/docs/sect-Metadata-Application.html

Show deprecated library elements with red color

Suppress warning on stderr caused by argv[0]

LibrePCB tries to open all project files passed as arguments to the
process. If the passed files...

Use lighter red/yellow background colors in parts table

DesktopServices: Support using (custom) xdg-open command

OpenGlView: Fix compile error on missing OpenGL defines

Manually adding some OpenGL defines not available on some targets.

CI: Make build_mac_bundle.sh working on Apple Silicon

Fix possibly broken copy&paste in editors on some systems

At least on one system the clipboard didn't work if no text was
set, so let's also copy the `SEx...

Library editor: Fix possible layout issue of banner

WorkspaceLibraryScanner: Do not warn about empty directories

So far, the background library scanner emitted warnings to `stderr` for
each directory within wo...

Fix using legacy 'PARTNUMBER' attribute as default value

The attribute `PARTNUMBER` has been renamed to `MPN` in v1.0, but the
library editor still recom...

Board editor: Render pad & via texts with Fontobene

So far the texts within pads and vias (pad number resp. net name) were
drawn with a TrueType fon...