Add story-style examples suite (27 stories + harness + CI) #3007

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	44s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 11s
checks / test (3.12, locked, ubuntu-latest)	1m 25s
checks / test (3.10, locked, ubuntu-latest)	1m 7s
checks / test (3.11, locked, windows-latest)	1m 46s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 7s
checks / test (3.13, lowest-direct, windows-latest)	1m 38s
checks / test (3.14, locked, windows-latest)	2m 15s
checks / test (3.10, locked, windows-latest)	1m 35s
checks / test (3.12, lowest-direct, windows-latest)	1m 55s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 7s
checks / test (3.12, locked, windows-latest)	1m 32s
checks / test (3.13, locked, ubuntu-latest)	59s
checks / test (3.14, lowest-direct, ubuntu-latest)	59s
checks / test (3.11, lowest-direct, windows-latest)	1m 44s
checks / test (3.14, locked, ubuntu-latest)	2m 4s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 12s
checks / test (3.11, locked, ubuntu-latest)	1m 1s
checks / test (3.14, lowest-direct, windows-latest)	1m 38s
checks / test (3.10, lowest-direct, windows-latest)	1m 35s
checks / test (3.13, locked, windows-latest)	1m 54s
all-green	2s
	30m 41s

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