feat(mcp-server): add web component testing docs + isAbstract flag #26734

Job	Run time
check-bundle-size	3m 23s
reuse-compliance	14s
lint	1m 54s
build / Build (18)	2m 10s
build / Build (19)	1m 45s
deploy-next-docs	1m 59s
test / Playwright (19)	3m 1s
test / Playwright (18)	3m 14s
test / MCP Server	3m 3s
test / Cypress (cypress-commands, 18)	2m 17s
test / Cypress (main/src/components, 18)	7m 42s
test / Cypress (main/src/internal, 18)	2m 11s
test / Cypress (base, 19)	2m 38s
test / Cypress (compat, 19)	1m 58s
test / Cypress (main/src/internal, 19)	2m 3s
test / Cypress (main/src/webComponents, 18)	2m 18s
test / Cypress (main/src/webComponents, 19)	1m 25s
test / Cypress (main/src/components, 19)	7m 30s
test / Cypress (cypress-commands, 19)	1m 58s
test / Cypress (base, 18)	2m 52s
test / Cypress (compat, 18)	2m 27s
test / Combine Coverage	4s
	58m 6s

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