Add Set Name Gherkin spec

By specifier.

specs/set-name.feature

@@ -0,0 +1,61 @@
+# Scenarios: Set Name - 1, Set Name - 2, Set Name - 3, Set Name - 4, Set Name - 5
+Feature: Set Name
+
+  Background:
+    Given a wallet authenticated for the address bitcoincash:qqlrzp23w08434twmvr4fxw672whkjy0py26r63g3d
+    Given the wallet has spendable output to pay the transaction fee
+
+  Scenario Outline: Set Name - 1 a valid name is broadcast and the user lands on the account page
+    Given I navigate to the path /memo/set-name
+    When I type a name with the text "<name>"
+    When I submit the name
+    Then the app broadcasts an OP_RETURN transaction with the Memo set-name prefix
+    Then I navigate to the path /account
+    Then the account page shows my name as "<name>"
+
+    Examples:
+      | name |
+      | trout |
+      | a longer name with spaces |
+
+  Scenario Outline: Set Name - 2 an empty name is rejected on the set name page
+    Given I navigate to the path /memo/set-name
+    When I type a name with the text "<name>"
+    When I submit the name
+    Then the set name page shows a validation error
+    Then the app does not broadcast any transaction
+
+    Examples:
+      | name |
+      |  |
+
+  Scenario Outline: Set Name - 3 an over-long name is rejected on the set name page
+    Given I navigate to the path /memo/set-name
+    When I type a name with the text "<name>"
+    When I submit the name
+    Then the set name page shows a length error
+    Then the app does not broadcast any transaction
+
+    Examples:
+      | name |
+      | aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa |
+      | bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb |
+      | 😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀😀 |
+
+  Scenario Outline: Set Name - 4 the byte counter counts down from the name limit
+    Given I navigate to the path /memo/set-name
+    When I type a name with the text "<name>"
+    Then the set name page shows a remaining byte count of <count>
+
+    Examples:
+      | name | count |
+      |      | 77    |
+      | trout | 72   |
+      | é    | 75    |
+      | aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa | 0    |
+
+  Scenario: Set Name - 5 the account page links to the set name page
+    Given I navigate to the path /account
+    Then the account page shows a Set Name button
+    When I click the Set Name button
+    Then I navigate to the path /memo/set-name