Add documents pointing to didexchange from Aries

Because DIDExchange is widely used within Aries and they are now linking
to didcomm.org, it is in the community's best interest to link to the
spec. Should anyone follow the links looking for documentation.

Signed-off-by: Colton Wolkins (Laptop) <[email protected]>

site/content/protocols/didexchange/1.0/readme.md

@@ -0,0 +1,15 @@
+---
+title: DIDExchange
+publisher: thetechmage
+license: MIT
+piuri: https://didcomm.org/didexchange/1.0
+status: Production
+summary: This protocol allows agents to exchange DIDs during the setup of a connection. Typically used during the use of the Out of Band protocol
+tags: []
+authors: []
+
+---
+
+This protocol is defined here: https://github.com/hyperledger/aries-rfcs/tree/bf3d796cc33ce78ed7cde7f5422b10719a68be21/features/0023-did-exchange
+
+Note: as pointed in the abovementioned link, the version of this protocol is 1.0 and was defined initially in Hyperledger Aries using DIDComm v1 headers/decorators. Readers should be aware that this protocol isn't necessary for DIDComm V2.

site/content/protocols/didexchange/1.1/readme.md

@@ -0,0 +1,15 @@
+---
+title: DIDExchange
+publisher: thetechmage
+license: MIT
+piuri: https://didcomm.org/didexchange/1.1
+status: Production
+summary: This protocol allows agents to exchange DIDs during the setup of a connection. Typically used during the use of the Out of Band protocol
+tags: []
+authors: []
+
+---
+
+This protocol is defined here: https://github.com/hyperledger/aries-rfcs/tree/d6d2fcf396790c117de02107a448dd64a6240801/features/0023-did-exchange
+
+Note: as pointed in the abovementioned link, the version of this protocol is 1.0 and was defined initially in Hyperledger Aries using DIDComm v1 headers/decorators. Readers should be aware that this protocol isn't necessary for DIDComm V2.