Feature - Add support for a fiscal year period defined in user settings.

* Add "This fiscal year", "Last fiscal year" as date range options in Transaction Details to filter transactions to those periods
* Add fiscal year ranges to Statistics & Trend Analysis
* Add "fiscal year start date" to user profile settings, allowing the user to select any date of the calendar year as the start of the fiscal year
* Add "fiscal year format" to user profile settings, allowing the user to specify how financial year date labels should appear

Implementation notes:
* The default fiscal year start is January 1 and the default fiscal year display format is "FY 2025"
* Fiscal year start date (month number & day number) are stored together in db as a uint16, high byte & low byte respectively
* February 29 is disallowed as a fiscal year start date, since it is never used as a convention in any country
* Jest is added to the project as a dev dependency, for unit tests in frontend

Signed-off-by: Sebastian Reategui <seb.reategui@gmail.com>

src/components/base/DateRangeSelectionBase.ts

@@ -81,9 +81,12 @@ export function useDateRangeSelectionBase(props: CommonDateRangeSelectionProps)
             DateRange.LastThirtyDays,
             DateRange.ThisWeek,
             DateRange.ThisMonth,
-            DateRange.ThisYear
+            DateRange.ThisYear,
+            DateRange.LastYear,
+            DateRange.ThisFiscalYear,
+            DateRange.LastFiscalYear
         ].forEach(dateRangeType => {
-            const dateRange = getDateRangeByDateType(dateRangeType.type, firstDayOfWeek.value) as TimeRangeAndDateType;
+            const dateRange = getDateRangeByDateType(dateRangeType.type, firstDayOfWeek.value, userStore.currentUserFiscalYearStart) as TimeRangeAndDateType;
 
             presetRanges.push({
                 label: tt(dateRangeType.name),