Add Odysseus preset: Dynamic matrix with π, Hermes, Helvetia, and Mythos² themes

[MarcelRaschke]

Summary

• Added a new Odysseus preset to the Matrix visualization addon.
• Combines Odysseus, Hermes, π, Helvetia, and Mythos² themes in a dynamic, interactive matrix.

Features

• Dynamic Matrix Grid: Falling symbols (⛵ Odysseus, ✈ Hermes, ➕ Helvetia, π) with a Matrix-style scrolling effect.
• π (Pi) Integration: Uses π digits for pseudo-random noise and patterns.
• Mythos²: Recursive matrix layers (nested cells for depth).
• Odysseus’ Path: A spiral tracing his journey (green trail).
• Hermes’ Wings: Dynamic yellow winged shapes (arrows and motion).
• Helvetia’s Swiss Cross: Red cross centered on the screen, pulsing with audio.
• Audio Reactivity: All elements respond to music (e.g., cross pulses with bass, symbols fall faster with high frequencies).

Files Changed

• (new)
• (added preset entry)
• (added localized string)

Testing

• Build and test in Kodi to verify the shader works as expected.

Closes #751c4c

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