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/vegetable_dish/红烧冬瓜/红烧冬瓜.md

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+# Braed Winter Melon Recipe
+
+Braised Winter Melon is a home-style dish characterized by its vibrant red color, savory and delicious flavor, and rich nutritional value.
+
+Estimated Cooking Difficulty: ★★★
+
+## Essential Ingredients and Tools
+
+* Winter Melon
+* Cooking Oil
+* Cooking Wine
+* Cornstarch
+* Light Soy Sauce
+* Dark Soy Sauce
+* Chicken Bouillon
+* Scallions
+* Minced Ginger
+* Oyster Sauce
+
+## Measurements
+
+Per serving:
+
+* Winter Melon 300 g
+* Cooking Oil 50 ml
+* Cooking Wine 2 ml
+* Cornstarch 10 g
+* Light Soy Sauce 10 ml
+* Dark Soy Sauce 15 ml
+* Chicken Bouillon 3 g
+* Scallions 0.5 stalk
+* Minced Ginger 1 clove
+* Oyster Sauce 15 ml
+
+## Instructions
+
+* Peel the winter melon and cut it into small cubes with sides no longer than 2 cm.
+* Heat oil in a wok, add the winter melon, and gently fry until the surface turns golden brown, about 2 minutes.
+* Remove the winter melon and set aside in a large bowl.
+* Using the remaining oil in the wok, add minced ginger, light soy sauce, and oyster sauce. Stir-fry for 15 seconds.
+* Return the winter melon to the wok. Stir-fry for another 30 seconds, then add enough boiling water to cover the melon. Simmer on high heat for 10 minutes.
+* Add dark soy sauce for color. Continue cooking until the winter melon becomes soft and tender (easily pierced with a chopstick).
+* Add chicken bouillon, cooking wine, and scallions. Stir-fry for 30 seconds, then transfer the winter melon back to the large bowl.
+* Reserve the remaining sauce in the wok. Pour in the cornstarch slurry and bring to a boil. Pour the thickened sauce over the winter melon.
+
+![Example Dish](./1.jpeg)
+![Example Dish](./2.jpeg)
+
+## Additional Notes
+
+If you encounter any issues or have suggestions for improvement while following this guide, please submit an Issue or Pull Request.