docs: fixes in shipping, payment, and other documentations

* added integration

* add segment for API reference

* updated frontend checkout flow

* added paypal documentation

* Improve storefront quickstart documents

* added documentation for entities

* docs: disable running tests for docs

* added docs contribution guidelines

* Use npm2yarn where missing

* added additional steps section

* added notification overview

* Added guidelines for sidebar labels

* added how to create notification provider

* fixes

* fixes for payment provider

* fixes

* chore(deps): bump sqlite3 from 5.0.2 to 5.0.3 (#1453)

Bumps [sqlite3](https://github.com/TryGhost/node-sqlite3) from 5.0.2 to 5.0.3.
- [Release notes](https://github.com/TryGhost/node-sqlite3/releases)
- [Changelog](https://github.com/TryGhost/node-sqlite3/blob/master/CHANGELOG.md)
- [Commits](https://github.com/TryGhost/node-sqlite3/compare/v5.0.2...v5.0.3)

* fix: Issue with cache in CI pipeline

* Use npm2yarn where missing

* added integration

* add segment for API reference

* fix double segment

* updated frontend checkout flow

* added documentation for entities

* added docs contribution guidelines

* Added guidelines for sidebar labels

* added additional steps section

* added notification overview

* added how to create notification provider

* chore: Add issue template for bug reports (#1676)

* chore: Add issue template for feature requests (#1679)

* fixes

* fixes for payment provider

* fixes

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Oliver Windall Juhl <59018053+olivermrbl@users.noreply.github.com>

www/docs/sidebars.js

@@ -112,12 +112,12 @@ module.exports = {
                 {
                   type: "doc",
                   id: "advanced/backend/endpoints/add-storefront",
-                  label: "Add Endpoint for Storefront"
+                  label: "Create Endpoint for Storefront"
                 },
                 {
                   type: "doc",
                   id: "advanced/backend/endpoints/add-admin",
-                  label: "Add Endpoint for Admin"
+                  label: "Create Endpoint for Admin"
                 },
               ]
             },
@@ -129,7 +129,7 @@ module.exports = {
             {
               type: "category",
               label: 'Subscribers',
-              collapsed: false,
+              collapsed: true,
               items: [
                 {
                   type: "doc",
@@ -161,7 +161,7 @@ module.exports = {
                 {
                   type: "doc",
                   id: "advanced/backend/shipping/add-fulfillment-provider",
-                  label: "Add Fulfillment Provider"
+                  label: "Create a Fulfillment Provider"
                 }
               ]
             },
@@ -178,6 +178,7 @@ module.exports = {
                 {
                   type: "doc",
                   id: "advanced/backend/payment/how-to-create-payment-provider",
+                  label: "Create a Payment Provider"
                 },
               ]
             },