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/views/desktop/user/settings/tabs/UserBasicSettingTab.vue

@@ -142,6 +142,16 @@
                                     v-model="newProfile.firstDayOfWeek"
                                 />
                             </v-col>
+
+                            <v-col cols="12" md="6">
+                                <fiscal-year-start-select
+                                    persistent-placeholder
+                                    :disabled="loading || saving"
+                                    :label="tt('Fiscal Year Start Date')"
+                                    :placeholder="tt('Fiscal Year Start Date')"
+                                    v-model="newProfile.fiscalYearStart"
+                                />
+                            </v-col>
                         </v-row>
                     </v-card-text>
 
@@ -200,6 +210,19 @@
                                     v-model="newProfile.shortTimeFormat"
                                 />
                             </v-col>
+
+                            <v-col cols="12" md="6">
+                                <v-select
+                                    item-title="displayName"
+                                    item-value="type"
+                                    persistent-placeholder
+                                    :disabled="loading || saving"
+                                    :label="tt('Fiscal Year Format')"
+                                    :placeholder="tt('Fiscal Year Format')"
+                                    :items="allFiscalYearFormats"
+                                    v-model="newProfile.fiscalYearFormat"
+                                />
+                            </v-col>
                         </v-row>
                     </v-card-text>
 
@@ -375,6 +398,7 @@ const {
     allShortDateFormats,
     allLongTimeFormats,
     allShortTimeFormats,
+    allFiscalYearFormats,
     allDecimalSeparators,
     allDigitGroupingSymbols,
     allDigitGroupingTypes,