feat: Add tools to manage terminal geometry

This commit introduces two main changes:

1.  A new program `showAll.go` that uses `wmctrl` to find all
    running terminals and print their geometry and workspace. This
    provides the core functionality for saving window positions.

2.  The existing `stuff.go` program has been fixed to correctly
    find and modify a terminal window. It now targets a generic
    "Terminal" window and correctly retrieves its geometry,
    allowing it to move and resize it successfully.

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