Add CONFIG_MODULE parameter to CMake function. Add Tests for CMake Integration.

This MR slightly improves the CMake integration of pystencils-sfg and adds tests for it:

• Add CONFIG_MODULE as a parameter to pystencilssfg_generate_target_sources, allowing to set the configuration module on a per-script basis
• Add a small CMake project to the test suite

src/pystencilssfg/lang/headers.py

@@ -24,6 +24,9 @@ class HeaderFile:
             return header
 
         system_header = False
+        if header.startswith('"') and header.endswith('"'):
+            header = header[1:-1]
+
         if header.startswith("<") and header.endswith(">"):
             header = header[1:-1]
             system_header = True