feat: add include_related option to client.Workspace in codersdk - #29284

Part of the lite codersdk.Workspace work (GRU-82, RFC). Stacked on #29233, which wired include_related into GET /api/v2/workspaces/{workspace}.

Adds include_related support to the codersdk client, expressed with the typed selection tree so only supported selections are representable:

• Moves the wsrelated package from coderd/ to codersdk/ so both the server and the client can share wsrelated.Config. coderd already depends on codersdk, so this only changes import paths on the server side.
• Adds Config.QueryParam, which encodes a selection into the include_related value: the dotted path of each selected node that has no selected descendants. Selecting a node implies its ancestors, so Parse round-trips the result back into an equal Config (covered by a round-trip test).
• WorkspaceOptions gains IncludeRelated *wsrelated.Config. A nil value omits the parameter (server returns everything, unchanged); a non-nil value is encoded via QueryParam, and a zero Config loads only the workspace.
• Client.Workspace now accepts optional WorkspaceOptions, backward compatible with existing client.Workspace(ctx, id) calls.

Testing

• codersdk internal test asserts WorkspaceOptions.asRequestOption sets include_related from the selection, following the existing WorkspaceFilter test pattern rather than spinning up a server.
• wsrelated tests cover QueryParam output and a Parse/QueryParam round trip.

make gen regenerated the WorkspaceOptions TypeScript type. Because the wire representation of include_related is a comma-separated string, scripts/apitypings maps wsrelated.Config to string in TypeScript, so include_related?: string rather than a nested object the frontend cannot serialize. api.getWorkspace already forwards WorkspaceOptions as query params, and a frontend test in api.test.ts confirms include_related is sent through.

Generated by Coder Agents on behalf of @spikecurtis.