Changes file structure; experiments with better string; Search init in file list

src/widget_core/CMakeLists.txt

@@ -0,0 +1,13 @@
+add_library(widget_core STATIC)
+
+file(GLOB M_HEADERS "*.h")
+file(GLOB M_SOURCES "*.c")
+
+target_sources(widget_core
+    PRIVATE
+        ${M_SOURCES}
+    PUBLIC
+        FILE_SET HEADERS
+        FILES
+            ${M_HEADERS}
+)