Add ASCII directory tree visualization script

[Copilot]

Adds repo_tree.py to generate a complete ASCII tree visualization of the repository structure, similar to the tree command.

Implementation

• Recursive directory traversal using pathlib.Path.iterdir()
• ASCII box-drawing characters (├──, └──, │) for proper tree formatting
• Filters hidden entries (names starting with .)
• Graceful PermissionError handling
• Directories listed before files, both alphabetically sorted

Usage

python repo_tree.py

Outputs 2933 lines covering the full repository structure:

Prometheus_VDM/
├── Derivation/
│   ├── Agency_Field/
│   │   ├── Coordination_Depth/
│   │   │   └── PROPOSAL_Multipartite_Coordinaton_Depth_v1.md
│   │   ├── Witness/
│   │   │   └── PROPOSAL_Agency_Witness_v1.md
...

Original prompt

Create a Python script that recursively scans the entire repository directory structure and prints a comprehensive ASCII file tree map (similar to the output of the tree command) through every folder and subfolder. The output should match the full layout of the repository. The script should:

• Run from the root of the repository.
• Walk through all directories and subdirectories.
• Output the complete file tree as plain text to stdout.
• Use ASCII-graphics similar to:
  dirname/
  ├── file1
  └── subdir/
  └── file2
• Handle arbitrarily nested folders.
• Ignore hidden files and directories (those starting with a dot).
  Provide this script at the root named: repo_tree.py.

This pull request was created from Copilot chat.

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