Fix unmarshalling issues and adjust logging for debugging

Modify `FunctionCall` struct to handle arguments as strings. Add debugging logs to facilitate error tracing and improve JSON unmarshalling in various functions.

cmd/answer.go

@@ -6,6 +6,7 @@ import (
 	"answer/pkg/search"
 	"context"
 	gollm "gitea.stevedudenhoeffer.com/steve/go-llm"
+	"github.com/joho/godotenv"
 	"github.com/urfave/cli"
 	"log/slog"
 	"os"
@@ -36,6 +37,12 @@ func main() {
 		Description: "",
 
 		Flags: []cli.Flag{
+			&cli.StringFlag{
+				Name:  "env-file",
+				Value: ".env",
+				Usage: "file to read environment variables from",
+			},
+
 			&cli.StringFlag{
 				Name:  "model",
 				Value: "openai/gpt-4o",
@@ -66,6 +73,11 @@ func main() {
 			if c.NArg() == 0 {
 				return cli.ShowAppHelp(c)
 			}
+
+			if c.String("env-file") != "" {
+				_ = godotenv.Load(c.String("env-file"))
+			}
+
 			var question answer.Question
 
 			question.Question = strings.Join(c.Args(), " ")