feat: expose repository name and architecure in configuration if available

In some cases there are reference to current repository settings. In
order to handle it correctly two ro options have been added

Related to #154

docs/configuration.rst

@@ -139,6 +139,8 @@ Build related configuration. Group name can refer to architecture, e.g. ``build:
 
 Base repository settings.
 
+* ``architecture`` - repository architecture, string. This field is read-only and generated automatically from run options if possible.
+* ``name`` - repository name, string. This field is read-only and generated automatically from run options if possible.
 * ``root`` - root path for application, string, required.
 
 ``sign:*`` groups