[Enhancement] Display Ignored Directories with Marker in File Tree

[kasperjunge]

This PR updates the FileTreeGenerator to improve the clarity of the generated context report. The changes include:

• New Behavior for Ignored Directories:
  When a directory is excluded via .copconignore or .copcontarget, its name is still shown in the file tree. However, instead of recursing into its children, the directory is displayed with a trailing slash and the marker (contents not displayed). This clearly indicates that the directory exists but its contents were intentionally omitted.

• Implementation Details:

  • In copcon/core/file_tree.py, the generate() method was updated to check for ignored directories. If a directory is determined to be ignored (via the file filter), its entry is appended with the marker, and no recursion is performed into that directory.
  • The directory and file counts are maintained appropriately.

• Tests Updated:
  A new test in tests/test_file_tree.py verifies that:

  • Ignored directories (e.g., node_modules) are displayed with the correct marker.
  • The children of ignored directories are not listed.
  • The overall directory and file counts match the expected values.

This enhancement helps users understand the structure of their project while clearly indicating which directories were filtered out.

Looking forward to your feedback!