refactor(IShare): Add typing for IShare #29630

Job	Run time
changes	9s
PostgreSQL 18 (PHP 8.3) - database tests	10m 3s
PostgreSQL 18 (PHP 8.4) - database tests	12m 28s
PostgreSQL 18 (PHP 8.5) - database tests	10m 27s
PostgreSQL 14 (PHP 8.2) - database tests	16m 46s
phpunit-pgsql-summary	7s
	50m 0s

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