many fixes and improvements - rework for modules/ and common/

feat(emailer): add Postmark and Resend providers

backend/appsettings.Development.json

@@ -0,0 +1,19 @@
+{
+  "ConnectionStrings": {
+    "PostgresConnection": "Server=localhost,5432;Database=Hutopy;Uid=sa;Pwd=P@ssword123!;"    
+  },
+  "Stripe": {
+    "SecretKey": "sk_test_51OoveVDrRyqXtNdBaOs1DFFja0XhrQtJoAo83uSySMuqw4Wyt9NsuugrIHRqet9a50cr5GvolpTP8EZuTSttcgYx00gOUPNDoI",
+    "WebhookSecret": "whsec_cee07ef14cf784850cab63567048b5326fec7fd29c03f4659476524f8299aff1",
+    "HutopyRate": 0.05
+  },
+  "Website": {
+    "FrontendBaseUrl": "https://localhost:5173"
+  },
+  "Authentication": {
+    "Jwt": {
+      "Lifetime": "00:05:00",
+      "RefreshTokenLifetime": "0.00:30:00"
+    }
+  }
+}