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/糖拌西红柿/糖拌西红柿.md

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+# How to Make Sugar-Tossed Tomatoes
+
+![Example Dish](./volcano-snow.jpg)
+
+Fresh, delicious, easy to prepare, and highly nutritious. This cold dish is perfect for summer and a delightful addition to any family table. Tomatoes are rich in Vitamin C, and the recipe is simple, taking just a few minutes to complete.
+
+Estimated Cooking Difficulty: ★★
+
+## Ingredients and Tools Needed
+
+- Tomatoes
+- White sugar
+- Refrigerator
+
+## Serving Size
+
+One batch serves exactly 2 people.
+
+Per serving:
+
+- 2 tomatoes (each weighing approximately 100g, totaling 200g)
+- 20g white sugar
+
+## Instructions
+
+- Use a knife to score the tomato skin in a star pattern.
+- Insert chopsticks into the tomato's stem area and rotate it over a gas flame for 10 seconds (or pour boiling water over it for 30 seconds) until the skin curls.
+- Peel off the tomato skin completely.
+- Cut the tomatoes into large chunks (cutting along the natural lines helps retain more juice). Remove the stem and core, then set aside.
+- Once all tomatoes are cut, arrange them in a single even layer on a plate.
+- Sprinkle with white sugar. Repeat the layering and sprinkling process until all tomatoes are used.
+- Refrigerate for 10 minutes.
+- Your sugar-tossed tomatoes are ready! Nutritious, delicious, sweet and tangy, perfect for cooling down and cutting through grease in the summer.
+
+## Additional Notes
+
+Please use knives with care during preparation.
+
+If you encounter any issues or have suggestions for improving the process after following this guide, please submit an Issue or Pull Request.