Add build-wiki command for isolated wiki generation

- Add BuildWikiWithOptions in native.go for building wiki from pre-existing topdata
- Add runBuildWiki and parseBuildWikiArgs in app.go for CLI integration
- Add --force flag to force rebuild even when output is current

internal/topdata/native.go

@@ -139,6 +139,41 @@ type NativeBuildOptions struct {
 	BuildWiki bool
 }
 
+type BuildWikiOptions struct {
+	Force bool
+}
+
+func BuildWikiWithOptions(p *project.Project, opts BuildWikiOptions, progress func(string)) (wikiResult, error) {
+	if progress == nil {
+		progress = func(string) {}
+	}
+	if !p.HasTopData() {
+		return wikiResult{}, errors.New("topdata is not configured for this project")
+	}
+
+	output2DA := compiled2DAOutputDir(p)
+	outputTLK := compiledTLKOutputDir(p)
+	if _, err := os.Stat(output2DA); os.IsNotExist(err) {
+		return wikiResult{}, fmt.Errorf("topdata build output missing: run build-topdata first")
+	}
+	if _, err := os.Stat(outputTLK); os.IsNotExist(err) {
+		return wikiResult{}, fmt.Errorf("topdata tlk output missing: run build-topdata first")
+	}
+
+	nativeResult := BuildResult{
+		Mode:         "native",
+		Output2DADir: output2DA,
+		OutputTLKDir: outputTLK,
+	}
+
+	wikiBuild, err := buildWiki(p, nativeResult, progress)
+	if err != nil {
+		return wikiResult{}, err
+	}
+
+	return wikiBuild, nil
+}
+
 func BuildNative(p *project.Project, progress func(string)) (BuildResult, error) {
 	return BuildNativeWithOptions(p, NativeBuildOptions{BuildWiki: true}, progress)
 }