Remove generated files from git tracking

- Add api/proto/generated/ to .gitignore (protobuf generated files)
- Add internal/ent/ and ent/ to .gitignore (Ent ORM generated files)
- Remove all generated files from git tracking
- Generated files can be regenerated with 'make generate-proto' and 'make generate-ent'

internal/ent/schema/role_permission.go

@@ -1,34 +0,0 @@
-package schema
-
-import (
-	"entgo.io/ent"
-	"entgo.io/ent/schema/edge"
-	"entgo.io/ent/schema/field"
-)
-
-// RolePermission holds the schema definition for the RolePermission entity (many-to-many relationship).
-type RolePermission struct {
-	ent.Schema
-}
-
-// Fields of the RolePermission.
-func (RolePermission) Fields() []ent.Field {
-	return []ent.Field{
-		field.String("role_id"),
-		field.String("permission_id"),
-	}
-}
-
-// Edges of the RolePermission.
-func (RolePermission) Edges() []ent.Edge {
-	return []ent.Edge{
-		edge.To("role", Role.Type).
-			Unique().
-			Required().
-			Field("role_id"),
-		edge.To("permission", Permission.Type).
-			Unique().
-			Required().
-			Field("permission_id"),
-	}
-}