Use typelib instead of XML

For normal compilation, use .typelib files rather than .gir XML files.
This is much faster.

Rather than using libgirepository, which would try to actually load the
libraries, we use a custom parser.

The language server will still read XML because it needs to access
documentation, which is not in the typelib, but that's generally fine
because it's a long lived process and only has to do that once.

blueprintcompiler/main.py

@@ -28,6 +28,7 @@ from .utils import Colors
 from .xml_emitter import XmlEmitter
 
 VERSION = "uninstalled"
+LIBDIR = None
 
 class BlueprintApp:
     def main(self):
@@ -144,7 +145,7 @@ class BlueprintApp:
         return ast.generate(), warnings
 
 
-def main(version):
-    global VERSION
-    VERSION = version
+def main(version, libdir):
+    global VERSION, LIBDIR
+    VERSION, LIBDIR = version, libdir
     BlueprintApp().main()