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/烤茄子/烤茄子.md

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+# How to Make Roasted Eggplant
+
+Simple, convenient, and incredibly fragrant.
+
+Estimated Cooking Difficulty: ★★★
+
+## Essential Ingredients and Tools
+
+- Eggplant
+- Cooking oil
+- Soy sauce (light soy sauce)
+- Minced garlic
+- Chili peppers
+- Cumin
+- Table salt
+
+## Measurements
+
+For two servings:
+
+- 1 Eggplant (approx. 200g)
+- 20-30 ml Cooking oil
+- 4-6 g Soy sauce
+- 1 Thai chili pepper (approx. 20g)
+- 3-4 cloves Minced garlic
+- 1-3 g Cumin
+- 0.5-2 g Table salt
+
+## Instructions
+
+- In a bowl, combine the soy sauce, cumin, table salt, minced garlic, and chopped Thai chili peppers. Mix evenly and set aside.
+- Wash the eggplant and pat it dry with a paper towel to remove surface moisture.
+- Use a fork to poke 4-8 holes on one side of the eggplant.
+- Apply 15-25 ml of cooking oil to coat the entire surface of the eggplant.
+- Preheat the oven to 200°C (with fan on high) for 2 minutes.
+- Place the eggplant in the middle or upper rack of the oven and roast for 12-15 minutes. It is ready when the surface is wrinkled and can be pressed down 0.3-0.5 cm deep.
+- Remove the eggplant and use a knife to make a vertical slit down the center, leaving 1-1.5 cm at the top and bottom uncut.
+- Insert a small knife or fork into the slit and cut through the interior vertically.
+- Gently open the slit and pour the prepared sauce over the eggplant.
+- Return the eggplant to the oven and roast at 200°C for 4-7 minutes.
+- Remove from the oven and turn off the power.
+
+## Additional Notes
+
+The final result is similar to roasted eggplant from a street BBQ stall; it smells amazing!
+
+**Precautions:**
+If the eggplant surface is wet, not fully coated with oil, or not pierced with a fork, it may **burst during roasting**.
+
+**Suggested Improvements:**
+When making the initial cut, you can slice the eggplant in half lengthwise first, then score the interior before applying the sauce.
+
+![Example of the finished dish](./烤茄子.jpg)
+
+If you encounter any issues or have suggestions for improving the process after following this guide, please submit an Issue or Pull request.