Rebuild without cxxtest in makedepends as it is in fact not needed.

Rebuild to fix reproducibility issue (wrong checksums).
Fixes #1
Switch to correct SPDX license identifier for project.
Switch to bash arrays with one entry per line for easier handling.

Fixes: FS#79279

Change cmake calls to adhere to packaging guidelines.

The application depends on ttf-roboto: https://bugs.archlinux.org/task/74472
Remove unneeded quotes and curly braces.
Add links to upstreamed patches.

Rebuild to add patch for adding CFLAGS and LDFLAGS to Makefile for mruby-zest
based frontend, which achieves full RELRO for zyn-fusion and libzest.so.

Switch to the mruby-zest based frontend using the upstream provided
mruby-zest-build repository.
Simplify quoting in file.
Simplify calls to cmake and make.
Add patch to allow mruby-zest build artifacts to be installed FHS compliant.
Add patch to allow the zynaddsubfx plugin to access the mruby-zest shared
library in a custom system location.
Add patches to devendor rtosc.

Upgrading to 3.0.5. Devendoring rtosc. Fixing installation of bash-completion file. Removing pdf documentation (not possible due to imagemagick/ghostscript settings). Leaving plenty of upstream tickets for zyn-fusion and zynaddsubfx.

Adding hicolor-icon-theme to depends. Introducing linebreaks.

Removing already included svg file. Building documentation. Installing documentation and native desktop files and icons. Minor fixes.

FTR, commands used to change arch=() and then verify the changes:

$ sed -Ei "/^arch=/{s/ *?['\"]?i686['\"]? *?//;s/ *$//}" */*/PKGBUILD*

$ grep -r i686 * | grep arch= | grep -v repos

$ svn diff | grep -A 1 ^-[^-] | grep -v -- -- | cut -c2- |
  while IFS=$'\n' read -r l1; IFS=$'\n' read -r l2; do
    echo "$l1 -> $l2"
  done | sort -u