feat: support Pricings flow (#2250)

* feat: fix price display

* feat: support subscription

* feat: fix select-plan-> signup -> buy-plan -> login flow

* feat: support paid-user to login and jump to the pricing page

* feat: support more subscription state

* feat: add payment providers for plan

* feat: format code

* feat: gofumpt

* feat: redirect to buy-plan-result page when user have pending subscription

* feat: response err when pricing don't exit

* Update PricingListPage.js

* Update ProductBuyPage.js

* Update LoginPage.js

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Co-authored-by: hsluoyz <hsluoyz@qq.com>

web/src/UserEditPage.js

@@ -390,7 +390,7 @@ class UserEditPage extends React.Component {
           </Col>
           <Col span={22} >
             <Select virtual={false} style={{width: "100%"}} value={this.state.user.type} onChange={(value => {this.updateUserField("type", value);})}
-              options={["normal-user"].map(item => Setting.getOption(item, item))}
+              options={["normal-user", "paid-user"].map(item => Setting.getOption(item, item))}
             />
           </Col>
         </Row>