Document docs/ignore shortcode

[jdbaldry]

No description provided.

[github-actions]

Readability report

File	AutomatedReadability	ColemanLiau	FleschKincaid	FleschReadingEase	GunningFog	LIX	SMOG
docs/sources/write/shortcodes/index.md	$${7.32\space\color{red}(Δ+0.02)}$$	$${10.41\space\color{red}(Δ+0.05)}$$	$${8.15\space\color{black}(Δ+0.00)}$$	$${56.82\space\color{red}(Δ-0.08)}$$	$${9.62\space\color{green}(Δ-0.05)}$$	$${39.39\space\color{red}(Δ+0.05)}$$	$${10.90\space\color{green}(Δ-0.06)}$$

View metric targets

Metric	Range	Ideal score
AutomatedReadability	6 (very easy read) to 14 (extremely difficult read)	8 or less
ColemanLiau	6 (very easy read) to 17 (extremely difficult read)	9 or less
FleschKincaid	6 (very easy read) to 17 (extremely difficult read)	8 or less
FleschReadingEase	100 (very easy read) to 0 (extremely difficult read)	70 or more
GunningFog	6 (very easy read) to 17 (extremely difficult read)	10 or less
LIX	20 (very easy read) to 60+ (extremely difficult read)	35 or less
SMOG	6 (very easy read) to 17 (extremely difficult read)	10 or less

[jdbaldry]

Converting to draft because of challenges with the docs/ignore implementation on the Killercoda side documented in grafana/killercoda#49

[chri2547]

a few suggestions.