docs(ref): v2 updates (#105)

* refactor: move document object to data contract subsection

The addition of tokens to the data contract page would make it really long. Splitting documents/tokens into their own pages to make viewing more manageable

* docs(ref): minor adjustments

* docs(ref): update contract st info

* docs(ref): update links

* docs(ref): update contract signing section

* docs: misc link fixes

* docs(ref): update contract object info

* docs(ref): move doc constraints to doc page

* docs(ref): contract object update and outdated schema removal

* docs(ref): update contract object table, add group and token sections

* docs(ref): add missing token reference

* docs(ref): add contract config info

* docs(ref): heading update

* docs(ref): update links on contract document page

* docs(ref): minor docs updates

* docs(ref): remove unnecessary position

* docs(ref): reorg some doc info and add doc config info

* docs(ref): minor editorial fixes

* docs(ref): expand doc info and reorganize

* docs(ref): minor edit fixes

* docs(ref): misc edits

* docs(ref): minor edits

* docs(ref): more doc reorg and updates

* docs(ref): update doc index section and expand

Include contested indices info

* docs(ref): minor edit

* docs(ref): doc constraints

Author: thephez

docs/explanations/platform-protocol-state-transition.md

@@ -36,7 +36,7 @@ The following table contains a list of currently defined payload types:
 
 | Payload Type | Payload Description |
 | - | - |
-| [Data Contract Create](../protocol-ref/data-contract.md#data-contract-creation) (`0`) | [Database schema](../explanations/platform-protocol-data-contract.md) for a single application |
+| [Data Contract Create](../protocol-ref/data-contract.md#data-contract-create) (`0`) | [Database schema](../explanations/platform-protocol-data-contract.md) for a single application |
 | [Batch](../protocol-ref/document.md#document-submission) (`1`) | An array of 1 or more [document](../explanations/platform-protocol-document.md) or token transition objects |
 | [Identity Create](../protocol-ref/identity.md#identity-create) (`2`) | Information including the public keys required to create a new [Identity](../explanations/identity.md) |
 | [Identity Topup](../protocol-ref/identity.md#identity-topup) (`3`) | Information including proof of a transaction containing an amount to add to the provided identity's balance |