Adding a skeleton of wpcomsh to experiment with running tests. #55486

Job	Run time
detect changed files	7s
Changelogger use	21s
Changelogger validity	1m 13s
Copied files are in sync	7s
Project structure	1m 32s
PHP Compatibility	1m 14s
PHP lint (7.0)	40s
PHP Code Sniffer (non-excluded files only)	1m 49s
PHP lint (7.2)	38s
PHP lint (7.4)	33s
PHP lint (8.0)	41s
PHP lint (8.1)	39s
ESLint (changes to excluded files only)	0s
PHP Code Sniffer (changes to excluded files only)	0s
PHP lint (8.2)	39s
PHP lint (8.3)	35s
ESLint (non-excluded files only)	0s
Lint GitHub Actions yaml files	33s
Check linter exclude lists	1m 54s
Lock files are up to date	1m 59s
Monorepo package version refs	1m 13s
	16m 27s

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