Rename BUILTIN_TOOLS to TEMPLATE_RENDERED_TOOLS to match what the set
actually represents: tools rendered directly by the HTML template instead of
pre-rendered through the TUI→ANSI→HTML pipeline.
Move grep and find off the template-rendered exclusion path so they use their
existing TUI renderCall/renderResult output in HTML export.
Add a dedicated HTML renderer for ls and keep it in the template-rendered set.
Unlike grep and find, rendering ls through the terminal-oriented Text component
introduced spacing artifacts in exported HTML due to full-width line padding,
so ls is rendered natively in the export template instead.
b2a1997ea0