feat(PrizePool): redesign table via Table2 with collapse rework

[Eetwalt]

Summary

• Migrate prize pool table rendering from the legacy Widget/Table to Widget/Table2 (header/body/footer sections, declarative rowspan/colspan)
• Reorder columns: Participant moves directly after Place; points column now renders before qualifies; currency/points cells right-aligned
• Rework collapse: class-based general-collapsible toggle rendered in the footer, replacing the per-row applyToggleExpand machinery; child classes now only supply open/close label text
• Rewrite per-column prize-cell merging via a prize matrix + Array.groupAdjacentBy/Table.deepEquals, extracted into _opponentPrizeCells
• Display placements as plain numbers/ranges (e.g. 1, 1-2) instead of ordinals, with colored gold/silver/bronze badges and pale row tints for top-3
• Restyle stylesheet for the Table2 structure; skip the legacy JS toggle when the table is inside .prizepool-table-wrapper
• Emit rowspan/colspan from Table2 Cell/CellHeader even without column definitions

How did you test this change?

dev + devtools

Before	After

[Eetwalt]

• what implications does this pose to the overall memory/runtime? (was one of my concerns when I was writing feat(prizepool): Redesign and currency switch for prize pools #7687)

Looking at https://liquipedia.net/dota2/index.php?title=BLAST/SLAM/7 with old and new prizepool, there seems to be not much difference

New	Old

[ElectricalBoy]

Suggested change

	---@param class string
	---@param text Renderable?
	---@param iconName string
	---@return Widget
	local function labeledButton(class, text, iconName)
	return Button{
	classes = {class},
	children = Span{
	children = WidgetUtil.collect(text, text and ' ' or nil, Icon{iconName = iconName}),
	},
	size = 'sm',
	variant = 'ghost',
	}
	end
	---@param buttonType 'expand'|'collapse'
	---@param text Renderable?
	---@param iconName string
	---@return VNode
	local function labeledButton(buttonType, text, iconName)
	return Button{
	classes = {'general-collapsible-' .. buttonType .. '-button'},
	children = Span{
	children = WidgetUtil.collect(text, text and ' ' or nil, Icon{iconName = iconName}),
	},
	size = 'sm',
	variant = 'ghost',
	}
	end

[ElectricalBoy]

Suggested change

	labeledButton('general-collapsible-expand-button', props.expandText, 'expand'),
	labeledButton('general-collapsible-collapse-button', props.collapseText, 'collapse'),
	labeledButton('expand', props.expandText, 'expand'),
	labeledButton('collapse', props.collapseText, 'collapse'),

[ElectricalBoy]

optional: `Module:Widget/GeneralCollapsible/LabeledToggle' maybe?