feat: add local holidays (#36116)

* feat: add local holidays

(cherry picked from commit aa18b25)

* test(Holiday List): weekly off and local holidays

(cherry picked from commit fd23bd0)

* feat(Holiday List): display localized country name

(cherry picked from commit 4888d75)

* fix: German translations of Holiday List

(cherry picked from commit 509061f)

# Conflicts:
#	erpnext/translations/de.csv

* fix(Holiday List): use current user's language

For consistency with "weekly off" descriptions

(cherry picked from commit 8271a39)

* fix(Holiday List): allow empty value

(cherry picked from commit 8aff5a1)

* refactor(Holiday List): use autocomplete fieldtype

(cherry picked from commit dab9688)

* chore: resolve merge conflicts

---------

Co-authored-by: barredterra <14891507+barredterra@users.noreply.github.com>

erpnext/setup/doctype/holiday_list/holiday_list.js

@@ -6,13 +6,41 @@ frappe.ui.form.on("Holiday List", {
 		if (frm.doc.holidays) {
 			frm.set_value("total_holidays", frm.doc.holidays.length);
 		}
+
+		frm.call("get_supported_countries").then(r => {
+			frm.subdivisions_by_country = r.message.subdivisions_by_country;
+			frm.fields_dict.country.set_data(
+				r.message.countries.sort((a, b) => a.label.localeCompare(b.label))
+			);
+
+			if (frm.doc.country) {
+				frm.trigger("set_subdivisions");
+			}
+		});
 	},
 	from_date: function(frm) {
 		if (frm.doc.from_date && !frm.doc.to_date) {
 			var a_year_from_start = frappe.datetime.add_months(frm.doc.from_date, 12);
 			frm.set_value("to_date", frappe.datetime.add_days(a_year_from_start, -1));
 		}
-	}
+	},
+	country: function(frm) {
+		frm.set_value("subdivision", "");
+
+		if (frm.doc.country) {
+			frm.trigger("set_subdivisions");
+		}
+	},
+	set_subdivisions: function(frm) {
+		const subdivisions = [...frm.subdivisions_by_country[frm.doc.country]];
+		if (subdivisions && subdivisions.length > 0) {
+			frm.fields_dict.subdivision.set_data(subdivisions);
+			frm.set_df_property("subdivision", "hidden", 0);
+		} else {
+			frm.fields_dict.subdivision.set_data([]);
+			frm.set_df_property("subdivision", "hidden", 1);
+		}
+	},
 });
 
 frappe.tour["Holiday List"] = [