php: Move server code into new phpx package

internal/wisski/ingredient/php/phpserver/errors.go

@@ -1,36 +0,0 @@
-package phpserver
-
-import "fmt"
-
-// Common PHP Errors
-var (
-	errPHPInit    = "Unable to initialize"
-	errPHPMarshal = "Marshal failed"
-	errPHPInvalid = ServerError{Message: "Invalid code to execute"}
-	errPHPReceive = "Failed to receive response"
-	errPHPClosed  = ServerError{Message: "Server closed"}
-)
-
-// PHPError represents an error during PHPServer logic
-type ServerError struct {
-	Message string
-	Err     error
-}
-
-func (err ServerError) Unwrap() error {
-	return err.Err
-}
-
-func (err ServerError) Error() string {
-	if err.Err == nil {
-		return fmt.Sprintf("PHPServer: %s", err.Message)
-	}
-	return fmt.Sprintf("PHPServer: %s: %s", err.Message, err.Err)
-}
-
-// Throwable represents an error during php code
-type Throwable string
-
-func (throwable Throwable) Error() string {
-	return string(throwable)
-}