Update staffing management to enhance payroll and hiring functionalities

- Increased the `MonthlyPayrollCap` from 10,000 to 40,000, allowing for greater flexibility in hiring and subject assignments.
- Revised payroll calculation logic to ensure that staff members are compensated based on their actual weekly hours, with a minimum payment reflecting one full rate.
- Updated documentation to clarify the new payroll structure and its implications for hiring and subject assignments.
- Enhanced tests to validate the new payroll cap and ensure proper functionality in staffing scenarios, including the handling of uncovered subjects.
- Improved localization strings to reflect changes in staffing and payroll terminology.

src/HSchool.Server/appsettings.json

@@ -1,20 +1,20 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
-  },
-  "AllowedHosts": "*",
-  "Simulation": {
-    "TickRate": 20,
-    "MaxSchools": 6,
-    "GameMinutesPerRealSecond": 5,
-    "DefaultStartDate": "2012-03-31T06:00:00",
-    "SavesDirectory": "saves",
-    "ModsDirectory": "mods",
-    "SaveIntervalSeconds": 30,
-    "MonthlyPayrollCap": 10000,
-    "SchoolWeekDays": 5
-  }
-}
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*",
+  "Simulation": {
+    "TickRate": 20,
+    "MaxSchools": 6,
+    "GameMinutesPerRealSecond": 5,
+    "DefaultStartDate": "2012-03-31T06:00:00",
+    "SavesDirectory": "saves",
+    "ModsDirectory": "mods",
+    "SaveIntervalSeconds": 30,
+    "MonthlyPayrollCap": 40000,
+    "SchoolWeekDays": 5
+  }
+}