Add hooks to register event types for decoding (#227)

* Global registration of type segmenters for event decoding

* Perform type sizes check when building client

* Introduce EventTypeRegistry for global runtime type sizes

* Fmt

* Register runtime type sizes on creation of EventTypeRegistry

* Register more default dispatch types

* Add missing type sizes

* fmt

* Fix up register_type_size builder method

* Update doc comments

* Make register_default_type_sizes public

* Don't allow duplicate registered types

* Remove call to supertraits type registration, done manually in Runtime

* Fix tests and warnings

* Fix duplicate type registration

* Fmt

* review: use is_empty()

Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>

* Add panic docs

Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>

src/error.rs

@@ -57,6 +57,13 @@ pub enum Error {
     /// Metadata error.
     #[error("Metadata error: {0}")]
     Metadata(#[from] MetadataError),
+    /// Unregistered type sizes.
+    #[error(
+        "The following types do not have a type size registered: \
+            {0:?} \
+         Use `ClientBuilder::register_type_size` to register missing type sizes."
+    )]
+    MissingTypeSizes(Vec<String>),
     /// Type size unavailable.
     #[error("Type size unavailable while decoding event: {0:?}")]
     TypeSizeUnavailable(String),