refactor(table2): move striping logic to client-side JavaScript

[Eetwalt]

Summary

Move table2 row striping from Lua server-side rendering to client-side JavaScript to better handle rowspan grouping. Striping now treats rows with rowspan > 1 as a single visual group, automatically re-stripes when tables are sorted, and adds group hover highlighting for rowspan groups.

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[Copilot]

Pull request overview

Moves Table2 row striping from Lua-render-time logic to a client-side JS module, enabling rowspan-aware “group” striping, re-striping after sort operations, and hover highlighting across rowspan groups.

Changes:

• Removed Lua BodyStripe context and server-side striping computation; Table2 rows now emit data-rowspan-count for client use.
• Updated Table2 widget to expose data-striped="false" when striping is disabled, and removed standalone CSS nth-child striping.
• Added javascript/commons/Table2.js to apply striping + group hover behavior and hooked it into javascript/Main.js.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
stylesheets/commons/Table2.scss	Adds table2__row--group-hover styling; removes standalone nth-child striping rule.
lua/wikis/commons/Widget/Table2/TableBody.lua	Removes server-side striping logic and BodyStripe context usage.
lua/wikis/commons/Widget/Table2/Table.lua	Adds data-striped="false" when striped is disabled; no longer wraps body in stripe context.
lua/wikis/commons/Widget/Table2/Row.lua	Emits data-rowspan-count for body rows to support JS grouping.
lua/wikis/commons/Widget/Contexts/Table2.lua	Removes BodyStripe context.
javascript/commons/Table2.js	New module implementing rowspan-aware striping, sortEnd re-striping, and group hover highlighting.
javascript/Main.js	Includes Table2 module in the test loader list.

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