Prevent duplicate binPath in PATH environment variable

- Check if binPath is already in PATH before adding it.
- Add binPath to PATH only if it's not already present.
- Log a message when binPath is added to PATH.

src/contributes/commandsBase.ts

@@ -62,5 +62,8 @@ export function getPipxEnvironmentPath(pythonCommand: string): string | null {
 
 function updateEnvironmentPath(binPath: string): void {
 	// Add BIN path to PATH
-	process.env.PATH = `${binPath}:${process.env.PATH}`;
+	if (process.env.PATH?.indexOf(binPath) === undefined) {
+		process.env.PATH = `${binPath}:${process.env.PATH}`;
+		logger.channel()?.info(`Added ${binPath} to PATH.`);
+	}
 }