Add English translations for all 379 recipe and tip files

Use dotlang AI translation (aiursoft-instruct:latest via Ollama) to
translate all Chinese content to English under en/ subfolder:
- en/dishes/: all recipe categories (aquatic, breakfast, condiment,
  dessert, drink, meat_dish, semi-finished, soup, staple, vegetable_dish)
- en/tips/: learn/ and advanced/ cooking guides
- en/README.md, en/CONTRIBUTING.md, en/CODE_OF_CONDUCT.md

The mkdocs-static-i18n plugin (docs_structure: folder) serves Chinese
at the root and English at /en/, with a language switcher in the UI.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

en/dishes/meat_dish/香菇滑鸡/香菇滑鸡.md

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+# How to Make Braised Chicken with Shiitake Mushrooms
+
+![Braised Chicken with Shiitake Mushrooms](./香菇滑鸡.jpg)
+
+Estimated Cooking Difficulty: ★★★
+
+## Essential Ingredients and Tools
+
+- Large chicken legs
+- Dried shiitake mushrooms
+- Ginger
+- Green onions
+- Garlic
+
+## Measurements
+
+Per serving:
+
+- Large chicken legs: 2
+- Dried shiitake mushrooms: 5 pieces
+- Ginger: 2 slices
+- Green onions: 2 stalks
+- Garlic: 2 cloves
+- Warm water (30-40 ℃): 150ml
+- Cooking wine: 15ml
+- Light soy sauce: 30ml
+- Salt: 1.5g
+- Dark soy sauce: 15ml
+- Sugar: 15ml
+- Sesame oil: 5ml
+
+## Instructions
+
+- Soak the dried shiitake mushrooms in warm water until softened.
+- Cut the ginger into small pieces, cut the green onions into sections, and halve the garlic cloves.
+- Bone the chicken legs (you can leave the bones in, but it might slightly affect a programmer's efficiency while eating). Cut the chicken into small pieces.
+- Cut the soaked shiitake mushrooms into quarters. Reserve the mushroom soaking water for later use.
+- Blanch the chicken pieces in boiling water for 1 minute to remove blood foam and impurities.
+- Add 15ml of cooking wine, 15ml of light soy sauce, 1.5g of salt, and 15ml of dark soy sauce to the chicken pieces. Mix well.
+- Heat oil to 30% temperature (low heat). Add the chicken pieces and stir-fry until golden brown. Remove and set aside.
+- Leave a little oil in the wok. Add green onions, ginger, and garlic, and stir-fry until fragrant. Add the shiitake mushrooms and stir-fry over high heat.
+- After about 20 seconds, you will smell the aroma of the shiitake mushrooms. Add the fried chicken pieces, all of the reserved mushroom water (**this programmer considers this the soul of the dish**), 15ml of sugar, and 30ml of light soy sauce.
+- Reduce heat to medium, leave the lid off, and simmer for 2 minutes to thicken the sauce. Drizzle with 5ml of sesame oil, sprinkle with chopped green onions, then turn off the heat and plate.
+
+## Additional Notes
+
+- Boneless chicken leg preparation is relatively complex. Here is my experience for reference:
+  - Place the chicken leg flat on the cutting board, with the **bone facing the programmer**. Make a deep cut from the top to the bottom, ensuring you touch the bone.
+  - Use your hands to pull the meat to the sides.
+  - Use the tip of the knife to separate the meat clinging to the bone.
+  - Flip the chicken leg. Insert the knife tip close to the bone and cut through the connection points between the bone and the meat.
+  - Use the knife tip to sever the final attachments.
+
+If you encounter any issues or have suggestions for improvement while following this guide, please submit an Issue or Pull request.