cmds.projects.CmdCreateFile: Add subdirs src/python

In order to allow Pyright to check the types provided by dependant repositories without installing them, pyrightconfig.json contains a list of paths to their root directories in "extraPaths".  These paths are unusable for Pyright, though: For type checking to work, it needs to be pointed to the "jw" namespace package paths within those repos. This commit achieves that by appending the subdirs src/python and tools/python to them, provided they exist.
TODO: This fix hardcodes the current project directory structure. Better would be a way to customize that via makefiles, where the paths can be more easily customized.
Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/cmds/projects/CmdCreateFile.py

@@ -54,7 +54,7 @@ class CmdCreateFile(Cmd):  # export
 
         extra_paths = []
         for m in prereq:
-            path = self.app.find_dir(m)
+            path = self.app.find_dir(m, search_subdirs = ['src/python', 'tools/python'])
             if path is None:
                 log(WARNING, f'No project directory for module "{m}"')
                 continue