Fix doc, migration guide, and HTML exporter about the new API #3488

Job	Run time
changes	6s
test-stlite-lib	1m 53s
test-browser	0s
test-kernel	0s
test-build-common	0s
test-sharing-common	0s
test-sharing-editor	0s
test-build-vscode-extension	0s
test-desktop	0s
build-desktop	3m 55s
build-sharing	3m 59s
build-browser	3m 49s
publish-browser	0s
publish-vscode-extension	0s
e2e-desktop	39s
Deploy @stlite/sharing to Cloudflare Pages	21s
build-sharing-editor	1m 27s
publish-desktop	0s
Deploy @stlite/sharing-editor to Cloudflare Pages	21s
	16m 30s

Provide feedback