feat(TextBadge): support custom colors and a removable variant

[damiengillesscality]

Why

In artesca-maestro#650 the deployment-card label chips are a custom component because TextBadge couldn't express what they need:

• a per-label color computed at runtime (custom text/background/border), not one of the six fixed theme variants — and TextBadge renders no border at all;
• a clickable "✕" to remove the label.

Rather than keep a bespoke chip in the app, this teaches TextBadge (the shared "badge") to do both, so the app can drop its custom component.

Changes

Two optional, fully backwards-compatible props on TextBadge:

• customColor — { text, backgroundColor, borderColor? }. When set, overrides the variant colors and adds a 1px border (borderColor falls back to text). Variant badges are unchanged and stay border-less.
• onRemove — when provided, a trailing "✕" button is rendered and called on click. removeAriaLabel labels it (defaults to "Remove"). The badge intentionally tracks no in-flight state — the handler should guard against repeated calls if needed.

The flex layout / gap is only applied in the removable case, so text-only and variant badges render exactly as before.

Added a Storybook story (CustomColorAndRemovable) and unit tests.

Follow-up

Once released, artesca-maestro#650 can bump @scality/core-ui and replace its custom LabelChip with TextBadge.

[bert-e]

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[bert-e]

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[damiengillesscality]

/approve

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[bert-e]

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