add Shiny express detection #1805

Job	Run time
jupyterlab / native (macos-latest)	4m 53s
jupyterlab / native (windows-latest)	7m 1s
build / build	4m 36s
agent / docker (ubuntu-latest)	3m 16s
jupyterlab / native (ubuntu-latest)	3m 6s
agent / native (macos-latest)	48s
agent / native (windows-latest)	3m 33s
vscode / docker	2m 29s
agent / native (ubuntu-latest)	39s
web / web	2m 26s
vscode / native (macos-latest)	52s
vscode / native (windows-latest)	3m 1s
vscode / native (ubuntu-latest)	41s
package / vscode	2m 34s
cypress / native (macos-latest)	59s
archive / archive	1m 32s
cypress / native (windows-latest)	4m 38s
bats / native (macos-latest)	24s
cypress / native (ubuntu-latest)	1m 10s
bats / docker (ubuntu-latest)	1m 42s
bats / native (windows-latest)	2m 24s
bats / native (ubuntu-latest)	13s
	52m 57s

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