Add configurable topdata wiki visibility policy (#4)

## Summary
- add YAML-backed generated wiki visibility policies for topdata datasets
- centralize page and reference eligibility through a visibility index
- cover eligibility helpers, metadata precedence, derived feat sets, and link suppression with toolkit tests

## Verification
- go test ./...
- module ./validate-topdata.sh with the feature toolkit binary
- module ./build-wiki.sh --force with the feature toolkit binary

Companion module branch: codex-wiki-visibility.

Reviewed-on: https://gitea.westgate.pw/ShadowsOverWestgate/sow-tools/pulls/4
Co-authored-by: vickydotbat <vickydotbat@tutamail.com>
Co-committed-by: vickydotbat <vickydotbat@tutamail.com>

internal/topdata/wiki_native.go

@@ -113,6 +113,8 @@ type wikiContext struct {
 	templateDir          string
 	wikiTablesPath       string
 	wikiTableDefinitions map[string]wikiTableDefinition
+	visibilityPolicy     *wikiVisibilityDefinitions
+	visibleWikiKeys      map[string]bool
 }
 
 func buildWiki(p *project.Project, nativeResult BuildResult, force bool, progress func(string)) (wikiResult, error) {
@@ -152,6 +154,10 @@ func buildWiki(p *project.Project, nativeResult BuildResult, force bool, progres
 		return wikiResult{}, err
 	}
 	ctx.wikiTableDefinitions = tableDefinitions
+	visibilityPath := filepath.Join(p.TopDataWikiSourceDir(), filepath.FromSlash(p.EffectiveConfig().TopData.Wiki.VisibilityFile))
+	if err := ctx.loadWikiVisibility(visibilityPath); err != nil {
+		return wikiResult{}, err
+	}
 
 	if err := os.RemoveAll(outputDir); err != nil {
 		return wikiResult{}, fmt.Errorf("clean wiki output: %w", err)
@@ -746,6 +752,9 @@ func (ctx *wikiContext) shouldGeneratePage(category, key string, row map[string]
 	if row == nil {
 		return false
 	}
+	if ctx.visibilityPolicy != nil {
+		return ctx.canReferenceWikiKey(key)
+	}
 	override := ctx.wikiGenerateOverride(row)
 	if override == "0" {
 		return false
@@ -790,6 +799,21 @@ func (ctx *wikiContext) shouldGeneratePage(category, key string, row map[string]
 	}
 }
 
+func (ctx *wikiContext) wikiRowCanRender(category string, row map[string]any) bool {
+	if row == nil {
+		return false
+	}
+	name := ctx.resolveRowName(category, row)
+	description := ctx.resolveRowDescription(category, row)
+	switch category {
+	case "classes", "spells":
+		if isToolLike(name, stringField(row, "Label"), stringField(row, "Constant")) {
+			return false
+		}
+	}
+	return name != "" && description != ""
+}
+
 func (ctx *wikiContext) renderPage(category, key string, row map[string]any, title string) (string, error) {
 	manualSections := ctx.manualSections
 	if len(manualSections) == 0 {
@@ -1000,7 +1024,7 @@ func (ctx *wikiContext) renderRaceFeatList(row map[string]any) string {
 
 func (ctx *wikiContext) renderReference(value any, idToKey map[int]string, nameResolver func(string) string) string {
 	key := resolveReferenceKey(value, idToKey)
-	if key == "" {
+	if key == "" || !ctx.canReferenceWikiKey(key) {
 		return ""
 	}
 	name := nameResolver(key)