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/意式肉酱面/意式肉酱面.md

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+# How to Make Spaghetti Bolognese
+
+![Finished Dish](./final.jpg)
+
+Spaghetti Bolognese is a very easy dish to prepare. Once you get the hang of it, you can make it in under 15 minutes, saying goodbye to instant noodles forever.
+
+Estimated Cooking Difficulty: ★
+
+## Essential Ingredients and Tools
+
+- Spaghetti
+- Spaghetti Sauce (Bolognese Sauce)
+- Ground Meat
+- White Onion (Purple onion also works)
+
+## Quantities
+
+Determine how many servings you want to make before starting. One serving is enough for 2 people.
+
+Per serving:
+
+- Spaghetti: 180g (adjust according to appetite)
+- Ground Meat: 80g (adjust according to appetite)
+- Onion: About half a large onion (approx. 150g, typically twice the weight of the meat)
+- Spaghetti Sauce: 300g (adjust as needed)
+- Cooking Oil: 10-15ml
+
+## Instructions
+
+- Add water to a pot and bring it to a boil. Then add the spaghetti (cook for 6–12 minutes).
+- While the water is heating up, you can prepare the sauce, but keep an eye on the pasta cooking time.
+- Dice the onion.
+- Heat oil in a pan over medium heat and add the diced onion.
+- Stir constantly to prevent the onion from burning until it becomes translucent.
+- Add the ground meat and continue stirring (breaking it up) until the meat turns brown.
+- Add the spaghetti sauce and stir briefly.
+- Drain the cooked spaghetti and mix it with the sauce (or simply pour the sauce directly over the pasta).
+
+## Additional Notes
+
+- Spaghetti comes in various thicknesses. Check the cooking time indicated on the pasta package before cooking.
+- Spaghetti sauce is not ketchup. The ketchup used in daily life is accurately called "ketchup," while spaghetti sauce, although both are seasoned tomato-based sauces, uses different seasonings.
+
+![Different Types of Pasta](./spaghetti.jpg)
+![Spaghetti Sauce](./sauce.jpg)
+
+If you encounter any issues or have suggestions for improvement while following this guide, please open an Issue or submit a Pull request.