refactor: change 'terraform' to 'internal/provider'

I would like to follow folder structure of
https://github.com/hashicorp/terraform-provider-scaffolding

terraform/conversions.go → internal/provider/conversions.go

@@ -1,4 +1,4 @@
-package terraform
+package provider
 
 // converting array of unknown types into array
 // of strings

terraform/datasource_integration.go → internal/provider/datasource_integration.go

@@ -1,4 +1,4 @@
-package terraform
+package provider
 
 import (
 	"context"

terraform/provider.go → internal/provider/provider.go

@@ -1,4 +1,4 @@
-package terraform
+package provider
 
 import (
 	"context"
@@ -9,7 +9,7 @@ import (
 )
 
 // This is provider's 'main' entry point.
-func StatusflareProvider(version string) *schema.Provider {
+func New(version string) *schema.Provider {
 
 	configFields := map[string]*schema.Schema{
 		"account_id": {

terraform/resource_monitor.go → internal/provider/resource_monitor.go

@@ -1,4 +1,4 @@
-package terraform
+package provider
 
 import (
 	"context"

main.go

@@ -7,7 +7,7 @@ import (
 
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/plugin"
-	"github.com/statusflare/terraform-provider-statusflare/terraform"
+	"github.com/statusflare/terraform-provider-statusflare/internal/provider"
 )
 
 var (
@@ -28,7 +28,7 @@ func main() {
 
 	opts := &plugin.ServeOpts{
 		ProviderFunc: func() *schema.Provider {
-			return terraform.StatusflareProvider(version)
+			return provider.New(version)
 		},
 	}