Implement IPC-D-356A netlist export for boards

CLI: Support "--drc" flag to run the design rule check

Schematic editor: Live update for schematic thumbnails

Merge all project related dialogs into single dialog

Replaces the following dialogs with a new, signle dialog called
"Project Setup":

- Project Prop...

Add "assembly type" property to packages

Add mount type column to pick&place CSV files

Add a new column named "Type" to pick&place files to indicate whether
a device is THT, SMT, Fidu...

DRC: Warn about devices which differ from schematic

Warn about devices which are different to the device configured in the
schematics. For example w...

DRC: Add checks for board outline validity

- Report missing board outlines
- Report non-closed board outlines
- Report too small inner edge...

DRC: Add checks for minimum drill distance

Refactor DRC & support approving messages

Refactor ERC by reusing library element check concept

Major changes:

- Completely refactored the ERC to the same concept as for the library
checks....

To make them usable for ERC/DRC as well.

Move board related messages from ERC to DRC

Although the ERC is nicer than the DRC because it is instantly updated,
board related messages (...

Board editor: Implement minimal DRC mode "quick check"

Store DRC settings in board file

Update/extend information shown in about dialog

- Open hyperlinks in the web browser configured in the workspace
settings.
- Fix too large dia...

Board editor: Merge all board settings into one dialog

To avoid accessing the width/height properties of the pads since they
actually do not apply for ...

Add configurable stop mask opening to non-plated holes

To avoid solder resist flowing into non-plated holes, auto-add a stop
mask opening to each hole....

CMake: Compile with '-Wpedantic' flag

To get more compiler warnings.

CLI: Support "--check" flag to run library element checks

Support dismissing library check messages

Package check: Turn overlapping pads into an error

So far there was only a clearance warning if the clearance between two
footprint pads was too sm...

Fix missing numeric sort at various places

Gerber export: Enable solder paste export by default

If you forget to enable the top/bottom solder paste export in the
Gerber export settings but sti...

Add support for footprint pads with custom corner radius

A round pad is the same as a rectangular pad with a corner radius of
100%, so let's eliminate th...

Add support for custom footprint pad shapes

Very useful to see where the origin of the pads is. In addition, it
allows to select/modify even...

To avoid possibly clearance issues in case a THT hole is not fully
located within its pad shape....

Always connect vias to planes, regardless of connect style

Support automatic THT pad annular rings