Add sparse matrix interface #2015

Job	Run time
Typos	7s
Documentation	2m 34s
basedpyright	2m 20s
Pytest Conda Py3 POCL	3m 13s
Ruff	9s
Tests for downstream project mirgecom	6s
Examples Conda Py3	1m 55s
Tests for downstream project mirgecom_examples	7s
Pytest Conda Py3 Intel	2m 39s
Tests for downstream project grudge	11m 38s
Tests for downstream project meshmode	10m 50s
	35m 38s

Provide feedback