✨ Add support for docs translations (#1168)

* 🌐 Refactor file structure to support internationalization

* ✅ Update tests changed after i18n

* 🔀 Merge Typer style from master

* 🔧 Update MkConfig with Typer-styles

* 🎨 Format mkdocs.yml with cannonical form

* 🎨 Format mkdocs.yml

* 🔧 Update MkDocs config

* ➕ Add docs translation scripts dependencies

* ✨ Add Typer scripts to handle translations

* ✨ Add missing translation snippet to include

* ✨ Update contributing docs, add docs for translations

* 🙈 Add docs_build to gitignore

* 🔧 Update scripts with new locations and docs scripts

* 👷 Update docs deploy action with translations

* 📝 Add note about languages not supported in the theme

* ✨ Add first translation, for Spanish

docs_src/handling_errors/tutorial006.py

@@ -0,0 +1,28 @@
+from fastapi import FastAPI, HTTPException
+from fastapi.exception_handlers import (
+    http_exception_handler,
+    request_validation_exception_handler,
+)
+from fastapi.exceptions import RequestValidationError
+from starlette.exceptions import HTTPException as StarletteHTTPException
+
+app = FastAPI()
+
+
+@app.exception_handler(StarletteHTTPException)
+async def custom_http_exception_handler(request, exc):
+    print(f"OMG! An HTTP error!: {exc}")
+    return await http_exception_handler(request, exc)
+
+
+@app.exception_handler(RequestValidationError)
+async def validation_exception_handler(request, exc):
+    print(f"OMG! The client sent invalid data!: {exc}")
+    return await request_validation_exception_handler(request, exc)
+
+
+@app.get("/items/{item_id}")
+async def read_item(item_id: int):
+    if item_id == 3:
+        raise HTTPException(status_code=418, detail="Nope! I don't like 3.")
+    return {"item_id": item_id}