Async API improvements "v2" (#672)

* Async API improvements "v2"

**NB: This PR actually changes only 3 files in `libraries/architecture/`. All the other changes are automated refactors to fix the calling code.**

This is a proposal for improvements to our `Async` type as discussed in: https://github.com/vector-im/element-x-android/pull/598/files#r1230664392 and in other chats.

Please bear in mind it is just a proposal, I'd love to hear your feedback about it, especially when it comes to naming: I've tried to make parameter and function names use a terminology similar to what we find in the Kotlin stdlib and its `Result` type.

I'm inclined to like more the non-extension flavours of the new `run*` APIs, though I'd also like your feedback about what API shape you prefer.

### Summary of the changes:
#### Functional
- Adds `exceptionOrNull()` API to complement the existing `dataOrNull()` API.
- Adds `isFailure()`, `isLoading()`, `isSuccess()` and `isUninitialized()` courtesy APIs.
- Renames `executeResult()` to `runUpdatingState()`:
	- Becomes the base API to which all the other similarly named APIs call into.
	- Makes it inline.
	- Adds contract.
	- Passes over any `prevData` to newre Async states.
	- Passes through the `block`s return value.
	- Adds unit tests.
- Renames `execute` to `runCatchingUpdatingState()` and makes it just call into `runUpdatingState()`
- Adds extension function overloads to the `run*` functions to accept `MutableState` as receiver

#### Cosmetics
- Reorders classes and methods in alphabetic order.
- Reorder parameter names to mimic conventions in Kotlin stdlib.
- Adds docstrings where useful.

* Use `fold()`

* rename pop to popFirst

* Add docstrings

* Please Detekt

* Rename exception to error.

* Please detekt

* Update existing usages.

features/logout/impl/src/main/kotlin/io/element/android/features/logout/impl/DefaultLogoutPreferencePresenter.kt

@@ -26,7 +26,7 @@ import io.element.android.features.logout.api.LogoutPreferenceEvents
 import io.element.android.features.logout.api.LogoutPreferencePresenter
 import io.element.android.features.logout.api.LogoutPreferenceState
 import io.element.android.libraries.architecture.Async
-import io.element.android.libraries.architecture.execute
+import io.element.android.libraries.architecture.runCatchingUpdatingState
 import io.element.android.libraries.di.SessionScope
 import io.element.android.libraries.matrix.api.MatrixClient
 import kotlinx.coroutines.CoroutineScope
@@ -59,6 +59,6 @@ class DefaultLogoutPreferencePresenter @Inject constructor(private val matrixCli
     private fun CoroutineScope.logout(logoutAction: MutableState<Async<Unit>>) = launch {
         suspend {
             matrixClient.logout()
-        }.execute(logoutAction)
+        }.runCatchingUpdatingState(logoutAction)
     }
 }