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/soup/菌菇炖乳鸽/菌菇炖乳鸽.md

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+# How to Make Mushroom and Squab Stew
+
+- Mushroom and Squab Stew: Fresh broth, tender meat, and rich in nutrients
+
+Estimated Cooking Difficulty: ★★★★
+
+## Essential Ingredients and Tools
+
+* Squab
+* Mushrooms
+* Corn
+* Ginger
+* Cooking wine
+* Table salt
+* Clay pot or pressure cooker
+
+## Quantities for 2 Servings
+
+* Squab: 300 g
+* Mushrooms: 100 g
+* Corn: 200 g
+* Ginger: 30 g
+* Cooking wine: 15 ml
+* Table salt: 10 g
+
+## Instructions
+
+* Rinse the squab thoroughly under cold water (pre-processed by the vendor).
+* Place the cleaned squab in a pot with cold water. Add 15 ml of cooking wine and ginger. Bring to a boil, then remove the squab immediately to preserve its nutrients.
+* Transfer the squab to a pressure cooker or clay pot. Add enough water to cover the squab. Add 20 g of ginger, 200 g of corn, and 100 g of mushrooms.
+
+  Note: Cook in a pressure cooker for 30 minutes. If using a clay pot, bring the water to a boil first, then reduce to low heat and simmer for 40–60 minutes.
+* Once cooked, serve in a bowl and season with 3–5 g of salt.
+
+![Example Dish](./菌菇炖乳鸽.jpg)
+
+## Additional Information
+
+If you encounter any issues or have suggestions for improvement while following this guide, please submit an Issue or Pull Request.