fix: use openapi content schema, misc fixes

This contains a series of fixes to get aepcli to work
off of parsing the unmodified roblox api.

A few areas of note:

aepcli was using incorrect schemas previously, which assumed
the schema was directly under the response rather than under
a content map.

the help text was not very legible when called from the
api name, making that into a list makes it possible to find
the resources.

There are no ways to handle singletons nor custom methods 
currently - therefore those are skipped.

There are also scenarios where additional dereferencing
is needed - so added support for arbitrary dereferencing.

As a shortcut, fields that are references in a resource
schema are just defaulted to being handled as arbtirary json
objects. In the future we can add more nested validation.

Author: toumorokoshi

cmd/aepcli/main.go

@@ -69,7 +69,7 @@ func aepcli() error {
 			os.Exit(1)
 		}
 		fileOrAlias = filepath.Join(cd, api.OpenAPIPath)
-		if api.PathPrefix == "" {
+		if pathPrefix == "" {
 			pathPrefix = api.PathPrefix
 		}
 		rawHeaders = append(rawHeaders, api.Headers...)
@@ -126,7 +126,7 @@ func setLogLevel(levelAsString string) error {
 	case "error":
 		level = slog.LevelError
 	default:
-		return fmt.Errorf("invalid log level:", levelAsString)
+		return fmt.Errorf("invalid log level: %v", levelAsString)
 	}
 	slog.SetLogLoggerLevel(level)
 	return nil