add taskoutput tool use formatter

[LasmarKhalifa]

closes #932

Improves the formatting of the taskoutput tool use message.

Current output:

New output:

[LasmarKhalifa]

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• add taskoutput tool use formatter #945 👈 (View in Graphite)
• add taskcreate tool use formatter #944
• add taskupdate tool use formatter #943
• add agent tool use formatter #942
• add task tool use formatter #941
• add skill tool use formatter #940
• add todowrite tool use formatter #939
• add edit tool use formatter #938
• add write tool use formatter #937
• add grep tool use formatter #936
• add glob tool use formatter #935
• add read tool use formatter #934
• add bash tool use formatter #933
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[juniper-shopify]

This code is a bit counterintuitive to read. It deserves a short comment like "# don't display decimal values if seconds is a whole number", but even that is clunky.

You can make this clearer and also more elegant with ActiveSupport::NumberHelper

Suggested change

	timeout_str = if timeout_ms
	secs = timeout_ms / 1000.0
	secs == secs.to_i ? "#{secs.to_i}s timeout" : "#{secs}s timeout"
	end
	timeout_str = if timeout_ms
	seconds = number_to_rounded(timeout_ms, delimiter: ",", precision: 3, strip_insignificant_zeros: true)
	"${seconds}s timeout"
	end