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/staple/酱拌荞麦面/酱拌荞麦面.md

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+# How to Make Sauce-Mixed Buckwheat Noodles
+
+Sauce-mixed buckwheat noodles are nutritious, healthy, sweet, and tangy.
+
+Estimated Cooking Difficulty: ★★
+
+## Essential Ingredients and Tools
+
+* Buckwheat noodles
+* Cucumber
+* Carrot
+* Lao Gan Ma (spicy chili sauce)
+
+## Measurements
+
+Per serving:
+
+* Buckwwheat noodles: 100 g
+* Cucumber: 0.5
+* Carrot: 0.5
+* Lao Gan Ma: 20 ml
+
+## Instructions
+
+* Cook the buckwheat noodles in cold water for 8–10 minutes, then drain and set aside.
+* Cut the cucumber and carrot into thin strips.
+* Place the buckwheat noodles, cucumber, and carrot on a plate, top with Lao Gan Ma, and mix well.
+
+![Example Dish](./1.jpeg)
+![Example Dish](./2.jpeg)
+
+## Additional Notes
+
+* For better texture, chill the drained buckwheat noodles in the refrigerator before serving.
+* You can customize the toppings based on personal preference, such as shrimp or minced meat.
+* You can substitute the sauce with other options like peanut butter or sesame paste, depending on your taste.
+* Buckwheat noodles have roughly the same calorie content as other types of noodles, so they may not be ideal as a staple food for weight loss.
+
+If you encounter any issues or have suggestions for improvement while following this guide, please submit an Issue or Pull Request.