sign typed message and updating public rpcs for tests

[Husienvora]

adding sign typed transaction method in the vault ,

[github-actions[bot]]

Coverage Report (73%)

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	73.13	65.58	86.2	73.52
chains	94.73	50	100	94.73
index.js	94.73	50	100	94.73	55
config	100	100	100	100
index.js	100	100	100	100
constants	100	100	100	100
index.js	100	100	100	100
constants/responses	100	100	100	100
index.js	100	100	100	100
lib	72.65	67.1	86.36	72.71
keyring.js	68.78	65.12	84.9	68.8	53, 70, 80, 84–85, 168–188, 219–222, 236–262, 284–294, 371–449, 466–469, 478, 496–497, 507, 513, 522, 528, 534–567, 572, 586–591, 601, 607, 616, 622, 628–661, 666, 682–687, 706–753, 843–846, 1057, 1087, 1113–1114, 1133–1215, 1317, 1346–1349, 1373–1375, 1405–1411, 1422, 1452–1459, 1481–1484, 1515–1530, 1557, 1563
vault.js	92.38	83.67	92.3	92.38	24, 34, 53–55, 84, 97, 113
utils	71.75	55.38	82.35	73.8
helper.js	71.75	55.38	82.35	73.8	9–16, 89–99, 132, 155, 167–169, 178–182, 203–205, 232, 250, 268, 335–367