Docs: Add DeepWiki badge to README (#234)

* Docs: Add DeepWiki badge to README.md

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Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

Author: google-labs-jules[bot]

README.md

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 # Project VOICE
 
+[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/google/project-voice)
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 Project VOICE is an experimental software developed as a communication support tool using generative AI for people who have difficulty in vocalizing and / or typing due to disabilities.
 
 This software uses generative AI to predict possible words and sentences that might be implied by the user’s input. The user can select a suggested word or sentence using accessibility features such as eye tracking and / or switch access. We aim to enable users to input longer sentences in fewer steps than other input methods.