php: Move server code into new phpx package

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

@@ -1,33 +0,0 @@
-package phpserver
-
-import (
-	"encoding/json"
-	"strings"
-)
-
-// Marshal marshals data as a PHP expression, meaning it can safely be used inside code.
-//
-// Typically data is marshaled using [json.Marshal] and decoded in PHP using 'json_decode'.
-// Special cases may exist for specific datatypes.
-func Marshal(data any) (string, error) {
-	switch d := data.(type) {
-	case string:
-		return MarshalString(d), nil
-	}
-
-	bytes, err := json.Marshal(data)
-	if err != nil {
-		return "", err
-	}
-
-	return "json_decode(" + MarshalString(string(bytes)) + ")", nil
-}
-
-var replacer = strings.NewReplacer("'", "\\'", "\\", "\\\\")
-
-// MarshalString marshals s as a php string that can be used safely as a PHP expression.
-//
-// See [https://www.php.net/manual/en/language.types.string.php#language.types.string.syntax.single].
-func MarshalString(s string) string {
-	return "'" + replacer.Replace(s) + "'"
-}