Drop evals shell plugin and just configure oaieval as another executable within openai shell plugin

Author: arunsathiya

plugins/evals/api_key.go

@@ -1,4 +1,4 @@
-package evals
+package openai
 
 import (
 	"github.com/1Password/shell-plugins/sdk"

plugins/evals/api_key_test.go

@@ -17,6 +17,7 @@ func New() schema.Plugin {
 		},
 		Executables: []schema.Executable{
 			OpenAICLI(),
+			OpenAIEvalsCLI(),
 		},
 	}
 }