feat(promotion, dashboard, core-flows, cart, types, utils, medusa): tax inclusive promotions (#12412)

* feat: tax inclusive promotions

* feat: add a totals test case

* feat: add integration test

* chore: changeset

* fix: typo

* chore: refactor

* fix: tests

* fix: rest of buyget action tests

* fix: cart spec

* chore: expand integration test with item level totals

* feat: add a few more test cases

---------

Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>

packages/admin/dashboard/src/i18n/translations/$schema.json

@@ -7362,6 +7362,9 @@
             "clearAll": {
               "type": "string"
             },
+            "taxInclusive": {
+              "type": "string"
+            },
             "amount": {
               "type": "object",
               "properties": {
@@ -7428,6 +7431,7 @@
             "allocation",
             "addCondition",
             "clearAll",
+            "taxInclusive",
             "amount",
             "conditions"
           ],
@@ -7626,6 +7630,19 @@
               "required": ["existing", "new", "none"],
               "additionalProperties": false
             },
+            "taxInclusive": {
+              "type": "object",
+              "properties": {
+                "title": {
+                  "type": "string"
+                },
+                "description": {
+                  "type": "string"
+                }
+              },
+              "required": ["title", "description"],
+              "additionalProperties": false
+            },
             "status": {
               "type": "object",
               "properties": {
@@ -7852,6 +7869,7 @@
             "and",
             "selectAttribute",
             "campaign",
+            "taxInclusive",
             "status",
             "method",
             "max_quantity",