Introduce a new setting for early validation (#1353)

Adds `validation.earlyValidation` as a new setting.

I chose to use `validation` as a primary key as we expect to add future settings for this feature.

internal/settings/settings.go

@@ -18,6 +18,10 @@ type ExperimentalFeatures struct {
 	PrefillRequiredFields bool `mapstructure:"prefillRequiredFields"`
 }
 
+type ValidationOptions struct {
+	EarlyValidation bool `mapstructure:"earlyValidation"`
+}
+
 type Indexing struct {
 	IgnoreDirectoryNames []string `mapstructure:"ignoreDirectoryNames"`
 	IgnorePaths          []string `mapstructure:"ignorePaths"`
@@ -36,6 +40,8 @@ type Options struct {
 	// ExperimentalFeatures encapsulates experimental features users can opt into.
 	ExperimentalFeatures ExperimentalFeatures `mapstructure:"experimentalFeatures"`
 
+	Validation ValidationOptions `mapstructure:"validation"`
+
 	IgnoreSingleFileWarning bool `mapstructure:"ignoreSingleFileWarning"`
 
 	Terraform Terraform `mapstructure:"terraform"`