Refactor reach package

- Rename reach package to emlid
- Create generic Reach websocket client
- Add 2 new subpackages 'updater' and 'reachview' to provides specific
API

emlid/updater/client.go

@@ -0,0 +1,15 @@
+// Package updater provides an API to communicate with the ReachRS modules "Updater" application
+package updater
+
+import "forge.cadoles.com/Pyxis/orion/emlid"
+
+// Client is a ReachRS Updater client
+type Client struct {
+	*emlid.Client
+}
+
+// NewClient returns a new ReachRS Updater client
+func NewClient(opts ...emlid.OptionFunc) *Client {
+	client := emlid.NewClient(opts...)
+	return &Client{client}
+}