feat: add "Full Name" field to user creation (#13659)

Adds the ability to specify "Full Name" (a.k.a. Name) when
creating users either via CLI or UI.

docs/cli/login.md

@@ -30,6 +30,15 @@ Specifies an email address to use if creating the first user for the deployment.
 
 Specifies a username to use if creating the first user for the deployment.
 
+### --first-user-full-name
+
+|             |                                          |
+| ----------- | ---------------------------------------- |
+| Type        | <code>string</code>                      |
+| Environment | <code>$CODER_FIRST_USER_FULL_NAME</code> |
+
+Specifies a human-readable name for the first user of the deployment.
+
 ### --first-user-password
 
 |             |                                         |

docs/cli/users_create.md

@@ -26,6 +26,14 @@ Specifies an email address for the new user.
 
 Specifies a username for the new user.
 
+### -n, --full-name
+
+|      |                     |
+| ---- | ------------------- |
+| Type | <code>string</code> |
+
+Specifies an optional human-readable name for the new user.
+
 ### -p, --password
 
 |      |                     |