Translating en/internal folder docs to Japanese 🇯🇵 (#26747)

* Add translation to fitst 3 file of internal folder

* Update Toctree.md and add files

* Update docs/source/ja/internal/generation_utils

Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>

* Rename generation_utils file

* rename pipelines_utils.md

* Change file names

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Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>

docs/source/ja/internal/image_processing_utils.md

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+!--Copyright 2022 The HuggingFace Team. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+the License. You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+specific language governing permissions and limitations under the License.
+
+⚠️ Note that this file is in Markdown but contain specific syntax for our doc-builder (similar to MDX) that may not be
+rendered properly in your Markdown viewer.
+
+-->
+
+# 画像プロセッサ用ユーティリティ
+
+このページには、画像プロセッサーで使用されるすべてのユーティリティー関数がリストされています。主に機能的なものです。
+画像を処理するために使用される変換。
+
+これらのほとんどは、ライブラリ内の画像プロセッサのコードを学習する場合にのみ役に立ちます。
+
+## Image Transformations
+
+[[autodoc]] image_transforms.center_crop
+
+[[autodoc]] image_transforms.center_to_corners_format
+
+[[autodoc]] image_transforms.corners_to_center_format
+
+[[autodoc]] image_transforms.id_to_rgb
+
+[[autodoc]] image_transforms.normalize
+
+[[autodoc]] image_transforms.pad
+
+[[autodoc]] image_transforms.rgb_to_id
+
+[[autodoc]] image_transforms.rescale
+
+[[autodoc]] image_transforms.resize
+
+[[autodoc]] image_transforms.to_pil_image
+
+## ImageProcessingMixin
+
+[[autodoc]] image_processing_utils.ImageProcessingMixin