Add task runner documentation

[tomi]

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[github-actions]

Overall readability score: 44.58 (🟢 +0.05)

File	Readability
task-runners.md	78.04 (-)
task-runners.md	69.93 (-)
hardening-task-runners.md	45.67 (-)

View detailed metrics

🟢 - Shows an increase in readability
🔴 - Shows a decrease in readability

File	Readability	FRE	GF	ARI	CLI	DCRS
task-runners.md	78.04	60.01	6.96	8.3	9.84	6.44
	-	-	-	-	-	-
task-runners.md	69.93	56.96	9.02	9.7	10.9	6.61
	-	-	-	-	-	-
hardening-task-runners.md	45.67	45.25	14.43	12.5	12.82	8.56
	-	-	-	-	-	-

Averages:

	Readability	FRE	GF	ARI	CLI	DCRS
Average	44.58	35.48	11.39	14.63	14.24	8.43
	🟢 +0.05	🟢 +0.04	🟢 +0	🟢 +0.01	🟢 +0.01	🟢 +0

View metric targets

Metric	Range	Ideal score
Flesch Reading Ease	100 (very easy read) to 0 (extremely difficult read)	60
Gunning Fog	6 (very easy read) to 17 (extremely difficult read)	8 or less
Auto. Read. Index	6 (very easy read) to 14 (extremely difficult read)	8 or less
Coleman Liau Index	6 (very easy read) to 17 (extremely difficult read)	8 or less
Dale-Chall Readability	4.9 (very easy read) to 9.9 (extremely difficult read)	6.9 or less