Write some amount of documentation

docs/navigation.md

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+# Navigation
+
+The Cagire application is organized as a grid composed of six views:
+
+```
+  Dict       Patterns    Options
+  Help       Sequencer   Engine
+```
+
+- `Dict` (Dictionary): A comprehensive list of all the `Forth` words used in the application.
+- `Help`: Provides detailed information about the application's features and functionalities.
+- `Patterns`: Pattern banks and pattern manager. Used to organize a session / project.
+- `Sequencer`: The main view, where you edit sequences and play music.
+- `Options`: Configuration settings for the application.
+- `Engine`: Configuration settings for the internal audio engine.
+
+## Switching Views
+
+Use `Ctrl+Arrow` keys to move between views. A minimap appears briefly showing your position in the grid.
+
+- `Ctrl+Left` / `Ctrl+Right` - move horizontally
+- `Ctrl+Up` / `Ctrl+Down` - move vertically
+
+The grid wraps horizontally, so you can cycle through views on the same row.
+
+## Getting Help
+
+Press `?` on any view to see its keybindings. This shows all available shortcuts for the current context.
+
+Press `Esc` to close the keybindings panel.
+
+## Common Keys
+
+These work on most views:
+
+- `Arrow keys` - move or scroll
+- `Tab` - switch focus between panels
+- `/` or `Ctrl+f` - search (where available)
+- `q` - quit (with confirmation)