aider: Import the `log/slog` package to fix the undefined `slog` error in `json_handler.go`.

# Aider chat conversation:

USER: ../json_handler.go:22:58: undefined: slog

ASSISTANT: To fix the undefined `slog` error in `json_handler.go`, we need to import the `log/slog` package. Here is the *SEARCH/REPLACE* block to make the necessary changes:

json_handler.go
```python
<<<<<<< SEARCH
	"log"
=======
	"context"
	"encoding/json"
	"log"
	"log/slog"
>>>>>>> REPLACE
```

json_handler.go

@@ -1,9 +1,12 @@
 package simplelog
 
 import (
+	"context"
+	"encoding/json"
 	"context"
 	"encoding/json"
 	"log"
+	"log/slog"
 	"log"
 )