LibLocale: Move locale source files to the LibLocale folder

These are still included in LibUnicode, but this updates their location
and the include paths of other files which include them.

Userland/Libraries/LibLocale/NumberFormat.h

@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2021, Tim Flynn <trflynn89@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Optional.h>
+#include <AK/String.h>
+#include <AK/StringView.h>
+#include <AK/Vector.h>
+#include <LibLocale/Forward.h>
+#include <LibLocale/PluralRules.h>
+
+namespace Locale {
+
+struct NumberGroupings {
+    u8 minimum_grouping_digits { 0 };
+    u8 primary_grouping_size { 0 };
+    u8 secondary_grouping_size { 0 };
+};
+
+enum class StandardNumberFormatType : u8 {
+    Decimal,
+    Currency,
+    Accounting,
+    Percent,
+    Scientific,
+};
+
+enum class CompactNumberFormatType : u8 {
+    DecimalLong,
+    DecimalShort,
+    CurrencyUnit,
+    CurrencyShort,
+};
+
+struct NumberFormat {
+    u8 magnitude { 0 };
+    u8 exponent { 0 };
+    PluralCategory plurality { PluralCategory::Other };
+    StringView zero_format {};
+    StringView positive_format {};
+    StringView negative_format {};
+    Vector<StringView> identifiers {};
+};
+
+enum class NumericSymbol : u8 {
+    ApproximatelySign,
+    Decimal,
+    Exponential,
+    Group,
+    Infinity,
+    MinusSign,
+    NaN,
+    PercentSign,
+    PlusSign,
+    RangeSeparator,
+    TimeSeparator,
+};
+
+Optional<StringView> get_number_system_symbol(StringView locale, StringView system, NumericSymbol symbol);
+Optional<NumberGroupings> get_number_system_groupings(StringView locale, StringView system);
+
+Optional<Span<u32 const>> get_digits_for_number_system(StringView system);
+String replace_digits_for_number_system(StringView system, StringView number);
+
+Optional<NumberFormat> get_standard_number_system_format(StringView locale, StringView system, StandardNumberFormatType type);
+Vector<NumberFormat> get_compact_number_system_formats(StringView locale, StringView system, CompactNumberFormatType type);
+Vector<NumberFormat> get_unit_formats(StringView locale, StringView unit, Style style);
+
+Optional<String> augment_currency_format_pattern(StringView currency_display, StringView base_pattern);
+Optional<String> augment_range_pattern(StringView range_separator, StringView lower, StringView upper);
+
+}