Replace logo with transparent version

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: un33k

README.md

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 # 🚀 ehAye™ Core CLI
 
-<img src="assets/ehaye-logo-t.png" alt="ehAye Logo" width="300" />
+<img src="assets/ehAye.png" alt="ehAye Logo" width="300" />
 
 **ehAye** *(pronounced "A.I.")* — A name that nods to Canadian "eh?" and Scottish "aye" (yes)