tablebench: report both row & column-major baselines

[DLehenbauer]

Display both row-major (typical database) and col-major (optimized REST endpoint) baselines and ratios.

Also prettify the reporting a bit for pasting into documents.

[msfluid-bot]

⯅ @fluid-example/bundle-size-tests: +187 Bytes

Metric Name	Baseline Size	Compare Size	Size Diff
aqueduct.js	511.82 KB	511.86 KB	⯅ +44 Bytes
connectionState.js	680 Bytes	680 Bytes	■ No change
containerRuntime.js	244.63 KB	244.65 KB	⯅ +22 Bytes
loader.js	170.65 KB	170.67 KB	⯅ +22 Bytes
map.js	46.41 KB	46.42 KB	⯅ +11 Bytes
matrix.js	149.11 KB	149.12 KB	⯅ +11 Bytes
odspDriver.js	96.8 KB	96.83 KB	⯅ +33 Bytes
odspPrefetchSnapshot.js	42.26 KB	42.29 KB	⯅ +22 Bytes
sharedString.js	168.49 KB	168.5 KB	⯅ +11 Bytes
sharedTree.js	333.77 KB	333.77 KB	■ No change
Total Size	1.87 MB	1.87 MB	⯅ +187 Bytes

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Baseline commit: bf7ae34b81cb28099a765311423071bbe697a830

Generated by :no_entry_sign: dangerJS against 8ac13a266481d31e60be6dba8245b419a78d1ed2