feat(dashboard, js-sdk, medusa, tax, types): custom tax providers (#12297)

* wip: setup loaders, add endpoints, module work, types, js sdk

* fix: tax module provider loader

* feat: select provider on region create, fix enpoint middleware registration

* feat: edit form

* fix: rename param

* chore: changeset

* fix: don't default to system provider

* fix: admin fixes, dispalt tax provider

* fix: some tests and types

* fix: remove provider from province regions in test

* fix: more tests, optional provider for sublevel regions, fix few types

* fix: OE test

* feat: edit tax region admin, update tax region core flow changes

* feat: migrate script

* fix: refactor

* chore: use query graph

* feat: provider section

integration-tests/modules/__tests__/fixtures/tax/index.ts

@@ -26,10 +26,12 @@ export const setupTaxStructure = async (service: ITaxModuleService) => {
   const [us, dk, de, ca] = await service.createTaxRegions([
     {
       country_code: "US",
+      provider_id: "tp_system_system",
       default_tax_rate: { name: "US Default Rate", rate: 2, code: "US_DEF" },
     },
     {
       country_code: "DK",
+      provider_id: "tp_system_system",
       default_tax_rate: {
         name: "Denmark Default Rate",
         rate: 25,
@@ -38,6 +40,7 @@ export const setupTaxStructure = async (service: ITaxModuleService) => {
     },
     {
       country_code: "DE",
+      provider_id: "tp_system_system",
       default_tax_rate: {
         code: "DE19",
         name: "Germany Default Rate",
@@ -46,6 +49,7 @@ export const setupTaxStructure = async (service: ITaxModuleService) => {
     },
     {
       country_code: "CA",
+      provider_id: "tp_system_system",
       default_tax_rate: {
         name: "Canada Default Rate",
         rate: 5,