feat: Add user roles, but do not yet enforce them (#1200)

* chore: Rework roles to be expandable by name alone

coderd/database/queries/organizationmembers.sql

@@ -21,6 +21,15 @@ INSERT INTO
 VALUES
 	($1, $2, $3, $4, $5) RETURNING *;
 
+
+-- name: GetOrganizationMembershipsByUserID :many
+SELECT
+	*
+FROM
+	organization_members
+WHERE
+  user_id = $1;
+
 -- name: GetOrganizationIDsByMemberIDs :many
 SELECT
     user_id, array_agg(organization_id) :: uuid [ ] AS "organization_IDs"
@@ -30,3 +39,14 @@ WHERE
     user_id = ANY(@ids :: uuid [ ])
 GROUP BY
     user_id;
+
+-- name: UpdateMemberRoles :one
+UPDATE
+	organization_members
+SET
+	-- Remove all duplicates from the roles.
+	roles = ARRAY(SELECT DISTINCT UNNEST(@granted_roles :: text[]))
+WHERE
+		user_id = @user_id
+		AND organization_id = @org_id
+RETURNING *;