✨ 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/tutorial002.py

@@ -0,0 +1,16 @@
+from fastapi import FastAPI, HTTPException
+
+app = FastAPI()
+
+items = {"foo": "The Foo Wrestlers"}
+
+
+@app.get("/items-header/{item_id}")
+async def read_item_header(item_id: str):
+    if item_id not in items:
+        raise HTTPException(
+            status_code=404,
+            detail="Item not found",
+            headers={"X-Error": "There goes my error"},
+        )
+    return {"item": items[item_id]}