fix: correct build path in release workflow

- Remove obsolete cmd/codeagent directory
- Fix release.yml build path to ./cmd/codeagent-wrapper

Generated with SWE-Agent.ai

Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>

codeagent-wrapper/cmd/codeagent/main.go

@@ -1,7 +0,0 @@
-package main
-
-import app "codeagent-wrapper/internal/app"
-
-func main() {
-	app.Run()
-}