OASIS-25945 Deprecate VPACK (#622)

Author: jwierzbo

v2/CHANGELOG.md

@@ -6,6 +6,7 @@
 - Switch to Go 1.22.6
 - Support for missing dirty read options (query, transaction apis)
 - Get inbound and outbound edges
+- Deprecate VPACK support
 
 ## [2.1.0](https://github.com/arangodb/go-driver/tree/v2.1.0) (2024-04-02)
 - Switch to Go 1.21.5

v2/README.md

@@ -1,3 +1,12 @@
 # ArangoDB Go Driver V2
 
-Implementation of Driver V2 makes use of runtime JSON/VPACK serialization, reducing memory and CPU Driver usage.
+Implementation of Driver V2 makes use of runtime JSON serialization, reducing memory and CPU Driver usage.
+The Combination of JSON serialization and HTTP2 support makes the driver more efficient and faster.
+
+## Deprecation Notice
+
+Since ArangoDB 3.12 VST support has been dropped and VPack is not anymore developed and maintained. 
+The driver will not support VST from version V2 and VPack support will be removed in the future.
+
+V1 driver is deprecated and will not receive any new features. Please use V2 instead.
+In V2 we have introduced a new way of handling requests and responses, which is more efficient and easier to use.

v2/connection/connection_http_content-type.go

@@ -27,5 +27,7 @@ const (
 
 	ApplicationJSON = "application/json"
 
+	// ApplicationVPack is the content type for VelocyPack
+	// Deprecated: Use JSON instead
 	ApplicationVPack = "application/x-velocypack"
 )