feat: introduce ExcelTable object #622

Job	Run time
lint	36s
check-docs	58s
check-wheel-build (3.8, ubuntu-latest, x86-64)	1m 32s
check-sdist-build	22s
check-wheel-build (3.8, ubuntu-latest, aarch64)	2m 3s
check-wheel-build (3.8, macos-14, x86-64)	1m 21s
test (3.8, ubuntu-latest)	1m 19s
check-wheel-build (3.8, macos-14, aarch64)	1m 4s
test (3.8, macos-14)	1m 32s
check-wheel-build (3.8, windows-latest, x86-64)	2m 43s
test (3.8, windows-latest)	3m 15s
test (3.9, ubuntu-latest)	1m 19s
test (3.9, macos-14)	1m 17s
test (3.9, windows-latest)	3m 14s
test (3.10, ubuntu-latest)	1m 20s
test (3.10, macos-14)	1m 2s
test (3.10, windows-latest)	3m 21s
test (3.11, ubuntu-latest)	1m 19s
test (3.11, macos-14)	1m 10s
test (3.11, windows-latest)	2m 39s
test (3.12, ubuntu-latest)	1m 12s
test (3.12, macos-14)	1m 19s
test (3.12, windows-latest)	3m 14s
	39m 11s

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