feat(fusion-sql): add support for Files API (personal and shared spaces) (#48)

* feat(stage): create an abstraction for FileLocation

* feat(files): add support for Files API (personal and shared spaces)

* feat(files): add unit tests

* feat(fusion-sql): add support for Files API (personal and shared spaces)

---------

Co-authored-by: Kevin D Smith <[email protected]>

Author: nunogoncalves03

singlestoredb/fusion/handler.py

@@ -74,6 +74,9 @@
     '<column>': '',
     '<catalog-name>': '',
     '<link-name>': '',
+    '<file-type>': r'''
+    file_type = { FILE | FOLDER }
+    ''',
 }
 
 BUILTIN_DEFAULTS = {  # type: ignore