Internationalization: move guide to en folder and preserve its history. (#494)

* chore: move guide to en folder

* docs: add english as language

docs/guide/src/en/async/use_future.md

@@ -0,0 +1,33 @@
+# UseFuture
+
+[`use_future`](https://docs.rs/dioxus-hooks/latest/dioxus_hooks/fn.use_future.html) lets you run an async closure, and provides you with its result.
+
+For example, we can make an API request inside `use_future`:
+
+```rust
+{{#include ../../examples/use_future.rs:use_future}}
+```
+
+The code inside `use_future` will be submitted to the Dioxus scheduler once the component has rendered.
+
+We can use `.value()` to get the result of the future. On the first run, since there's no data ready when the component loads, its value will be `None`.  However, once the future is finished, the component will be re-rendered and the value will now be `Some(...)`, containing the return value of the closure.
+
+We can then render that result:
+
+```rust
+{{#include ../../examples/use_future.rs:render}}
+```
+
+
+## Restarting the Future
+
+The `UseFuture` handle provides a `restart` method. It can be used to execute the future again, producing a new value.
+
+## Dependencies
+
+Often, you will need to run the future again every time some value (e.g. a prop) changes. Rather than `.restart`ing it manually, you can provide a tuple of "dependencies" to the hook. It will automatically re-run the future when any of those dependencies change. Example:
+
+
+```rust
+{{#include ../../examples/use_future.rs:dependency}}
+```