Split stuff out of representing types, and rewrite early/late bound chapter (rust-lang#2192)

Author: BoxyUwU

src/doc/rustc-dev-guide/src/SUMMARY.md

@@ -134,14 +134,13 @@
 
 - [Prologue](./part-4-intro.md)
 - [Generic parameter definitions](./generic_parameters_summary.md)
-    - [Implementation nuances of early/late bound parameters](./early-late-bound-params/early-late-bound-implementation-nuances.md)
-    - [Interactions with turbofishing](./early-late-bound-params/turbofishing-and-early-late-bound.md)
+    - [`EarlyBinder` and instantiating parameters](./ty_module/early_binder.md)
+- [Binders and Higher ranked regions](./ty_module/binders.md)
+    - [Instantiating binders](./ty_module/instantiating_binders.md)
+- [Early vs Late bound parameters](./early_late_parameters.md)
 - [The `ty` module: representing types](./ty.md)
     - [ADTs and Generic Arguments](./ty_module/generic_arguments.md)
     - [Parameter types/consts/regions](./ty_module/param_ty_const_regions.md)
-    - [`EarlyBinder` and instantiating parameters](./ty_module/early_binder.md)
-    - [`Binder` and Higher ranked regions](./ty_module/binders.md)
-    - [Instantiating binders](./ty_module/instantiating_binders.md)
 - [`TypeFolder` and `TypeFoldable`](./ty-fold.md)
 - [Parameter Environments](./param_env/param_env_summary.md)
     - [What is it?](./param_env/param_env_what_is_it.md)