refactor: migrate table2 to widget3

[Rathoz]

Summary

Migrate table2 to use widget3. This may temporarily break some Squad functionality. But Squad is stacked on this one, so a quick merge between the two.

How did you test this change?

dev with squad, but some independent table2 tests would be useful

[Copilot]

Pull request overview

This PR migrates the Table2 widget set from the legacy Widget (class-based) system to widget3 functional components + ComponentContext, aligning Table2 with the newer rendering pipeline.

Changes:

• Refactors Table2 components (Table, Header, Body, Row, Cell, CellHeader) to Component.component(...) and widget3 Html.
• Replaces legacy Widget contexts with ComponentContext providers/readers.
• Updates Table2 context definitions to use Context.create(...).

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 11 comments.

Show a summary per file

File	Description
lua/wikis/commons/Widget/Table2/TableHeader.lua	Migrates header to widget3 component + context provider usage.
lua/wikis/commons/Widget/Table2/TableBody.lua	Migrates body to widget3 component and rewrites striping/rowspan logic.
lua/wikis/commons/Widget/Table2/Table.lua	Migrates table wrapper to widget3 + new Html module; reintroduces defaults via Component.component.
lua/wikis/commons/Widget/Table2/Row.lua	Migrates row rendering to widget3 and updates context reads + cell indexing logic.
lua/wikis/commons/Widget/Table2/CellHeader.lua	Migrates header cell to widget3 and updates context reads + Html usage.
lua/wikis/commons/Widget/Table2/Cell.lua	Migrates cell to widget3 and updates context reads + Html usage.
lua/wikis/commons/Widget/Table2/All.lua	Renames internal export table variable; continues exporting Table2 entrypoints.
lua/wikis/commons/Widget/Contexts/Table2.lua	Replaces Widget2 contexts with widget3 ComponentContext definitions.

Comments suppressed due to low confidence (1)

lua/wikis/commons/Widget/Table2/Row.lua:86

• Cell/header detection uses getmetatable(child) comparisons against component metatables. For widget3 components, all VNodes share the same metatable, so this will never match and columnIndex/colspan inference won’t run. Use a VNode identity check (e.g., type(child)=='table' and child.renderFn == Table2Cell.renderFn / Table2CellHeader.renderFn) instead.

	local indexedChildren = Array.map(children, function(child)
		if getmetatable(child) == getmetatable(Table2Cell) or getmetatable(child) == Table2CellHeaderMT then
			local cellChild = child
			local explicitIndex = MathUtil.toInteger(cellChild.props.columnIndex)
			if explicitIndex and explicitIndex >= 1 then
				columnIndex = math.max(columnIndex, explicitIndex)
			elseif cellChild.props.columnIndex == nil then
				cellChild.props.columnIndex = columnIndex
			end

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[hjpalpha]

we use it with non arrays quite often currently