[TOOL] Procedural street and intersection building tool

We have released the alpha version of the StreetArch plugin for testing and evaluation by the community:

The underlying github repo of this release contains some usage instructions and the issue tracker (where we have listed some part of known bugs and issues - you may even post bugs or enchantments that you find yourself there).

Please tell us in this forum thread any feedback, suggestions or problems when you tryout the plugin.