core/tools: register glob_paths and grep_files in DEFAULT_TOOLS

Wire new search tools into FILE_TOOLS and document them.

src/plyngent/tools/__init__.py

@@ -4,6 +4,8 @@ from .file import copy_path as copy_path
 from .file import delete_path as delete_path
 from .file import edit_lineno as edit_lineno
 from .file import edit_replace as edit_replace
+from .file import glob_paths as glob_paths
+from .file import grep_files as grep_files
 from .file import listdir as listdir
 from .file import move_path as move_path
 from .file import read_file as read_file

src/plyngent/tools/file/__init__.py

@@ -3,6 +3,8 @@ from .edit_replace import edit_replace as edit_replace
 from .fs_ops import copy_path as copy_path
 from .fs_ops import delete_path as delete_path
 from .fs_ops import move_path as move_path
+from .glob_paths import glob_paths as glob_paths
+from .grep_files import grep_files as grep_files
 from .listdir import listdir as listdir
 from .read import read_file as read_file
 from .tree import tree as tree
@@ -13,6 +15,8 @@ FILE_TOOLS = [
     write_file,
     listdir,
     tree,
+    glob_paths,
+    grep_files,
     edit_replace,
     edit_lineno,
     copy_path,