docs(express): set x-internal: false on 4 operations

Add @public JSDoc tag to the 3 routes that were missing an explicit
visibility declaration. The 4th route (GET /api/v2/ping) already had
@public. The @public tag generates x-internal: false in the synced
express.yaml OpenAPI spec, satisfying the openapi-spec-quality lint rule.

Routes updated:
- POST /api/v1/wallets/simplecreate
- POST /api/v1/walletshare/{shareId}/acceptShare
- POST /api/v2/{coin}/verifyaddress

Ticket: DX-1065
Session-Id: 2350e389-b3c4-46ab-abd0-4bb17ef1df96
Task-Id: a2a9ad52-5781-4878-856b-c2484c5eb158

Author: starfy84

modules/express/src/typedRoutes/api/v1/acceptShare.ts

@@ -87,6 +87,7 @@ export const AcceptShareResponse = t.type({
  *
  * @operationId express.v1.wallet.acceptShare
  * @tag Express
+ * @public
  */
 export const PostAcceptShare = httpRoute({
   path: '/api/v1/walletshare/{shareId}/acceptShare',

modules/express/src/typedRoutes/api/v1/simpleCreate.ts

@@ -73,6 +73,7 @@ export const SimpleCreateResponse = t.intersection([
  *
  * @operationId express.v1.wallet.simplecreate
  * @tag Express
+ * @public
  */
 export const PostSimpleCreate = httpRoute({
   path: '/api/v1/wallets/simplecreate',

modules/express/src/typedRoutes/api/v2/verifyCoinAddress.ts

@@ -30,6 +30,7 @@ export const VerifyAddressV2Body = {
  *
  * @operationId express.verifycoinaddress
  * @tag Express
+ * @public
  */
 export const PostVerifyCoinAddress = httpRoute({
   path: '/api/v2/{coin}/verifyaddress',