fix(topdata): drop misleading SkipLFS option field; --skip-lfs sets env directly

CRUCIBLE_SKIP_LFS env is the single skip mechanism; BuildAndPackageOptions
had a dead SkipLFS field that implied the option propagated through the build
API but was only ever env-bridged in the CLI run functions. Replace the struct
field with a local buildTopDataArgs wrapper and set the env at the CLI entry
point directly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/topdata/top_package.go

@@ -76,7 +76,8 @@ func BuildAndPackage(p *project.Project, progress func(string)) (PackageResult,
 type BuildAndPackageOptions struct {
 	Force     bool
 	BuildWiki bool
-	SkipLFS   bool
+	// ponytail: no SkipLFS field — CRUCIBLE_SKIP_LFS env is the single skip mechanism;
+	// the CLI flag sets it directly before calling into this package.
 }
 
 func BuildAndPackageWithOptions(p *project.Project, opts BuildAndPackageOptions, progress func(string)) (PackageResult, error) {