feat: add INI setting for default_locale #114

Job	Run time
Coding standards	37s
Test for Memory Leaks	6m 12s
Code coverage (8.2, 70.1)	1m 39s
Tests: PHP 8.2, ICU 70.1	1m 59s
Tests: PHP 8.2, ICU 71.1	4m 10s
Tests: PHP 8.2, ICU 72.1	2m 6s
Tests: PHP 8.2, ICU 73.1	1m 39s
Tests: PHP 8.2, ICU 73.2	1m 50s
Tests: PHP 8.3, ICU 70.1	2m 1s
Tests: PHP 8.3, ICU 71.1	1m 52s
Tests: PHP 8.3, ICU 72.1	2m 23s
Tests: PHP 8.3, ICU 73.1	2m 16s
Tests: PHP 8.3, ICU 73.2	1m 43s
Install with pecl on php:8.2-cli-alpine3.18	32s
Install with pecl on php:8.2-cli-bookworm	35s
	31m 34s

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