refactor: Import endpoint utilize DTO pattern (#1546)

* Refactor Import to use dedicated `ImportResource` response

* Improve docs organisation

* Refactor Import controller to utilize a DTO pattern

* Improve CustomerRequest `rules`

* Add Import collection

Author: dmohns

collections/Advanced Transaction Search.bru

@@ -1,7 +1,7 @@
 meta {
   name: Advanced Transaction Search
   type: http
-  seq: 34
+  seq: 39
 }
 
 get {

collections/Appliances/folder.bru

@@ -1,6 +1,6 @@
 meta {
   name: Appliances
-  seq: 43
+  seq: 45
 }
 
 auth {

collections/Check Login (API).bru

@@ -1,7 +1,7 @@
 meta {
   name: Check Login (API)
   type: http
-  seq: 12
+  seq: 13
 }
 
 get {

collections/Check Login (Agent App).bru

@@ -1,7 +1,7 @@
 meta {
   name: Check Login (Agent App)
   type: http
-  seq: 13
+  seq: 14
 }
 
 get {

collections/Create Agent.bru

@@ -1,7 +1,7 @@
 meta {
   name: Create Agent
   type: http
-  seq: 29
+  seq: 32
 }
 
 post {

collections/Create AgentCharge.bru

@@ -1,7 +1,7 @@
 meta {
   name: Create AgentCharge
   type: http
-  seq: 22
+  seq: 23
 }
 
 post {

collections/Create Company.bru

@@ -1,7 +1,7 @@
 meta {
   name: Create Company
   type: http
-  seq: 17
+  seq: 18
 }
 
 post {

collections/Create Customer (incomplete information).bru

@@ -1,7 +1,7 @@
 meta {
   name: Create Customer (incomplete information)
   type: http
-  seq: 19
+  seq: 20
 }
 
 post {

collections/Create Customer.bru

@@ -1,7 +1,7 @@
 meta {
   name: Create Customer
   type: http
-  seq: 18
+  seq: 19
 }
 
 post {

collections/Devices/folder.bru

@@ -1,4 +1,4 @@
 meta {
   name: Devices
-  seq: 31
+  seq: 34
 }