✨ feat: parse negative integers

[knight42]

Signed-off-by: knight42 anonymousknight96@gmail.com

This adds support for negative integers in the marker syntax parser. This is useful for markers like +kubebuilder:validation:Minimum

[DirectXMan12]

Code looks good

Two comments:

1. This need a more detailed explanation of what it's doing in the PR/commit message -- maybe something like

✨ Support negative integers in marker syntax

This adds support for negative integers in the marker syntax parser.  This is useful for markers like PUT THE MOTIVATING CASE HERE

(please dd the motivating marker to the message)

2. Please update the marker syntax explanation Godoc at the top of that file as well as the book reference page (https://book.kubebuilder.io/reference/markers.html) to mention that negative integers are supported.

[knight42]

@DirectXMan12 PTAL

[alastor-erinyes]

LGTM

[vincepri]

/approve
/assign @alvaroaleman

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[alvaroaleman]

Hmm, I am almost inclined to say doc update isn't needed because I intuitively expect an int to support negative values (otherwise its an uint)?
/lgtm
/hold

To give Solly a but of time to respond re docs

[DirectXMan12]

@alvaroaleman that's a fair point. This does just bring things in line with what you might expect. Consider that objection withdrawn.

[DirectXMan12]

/hold cancel