nvim detects `.mustache` but ships no syntax for it, leaving Moodle templates
as plain text. `vim-mustache-handlebars` supplies syntax, indent and ftdetect,
covering the constructs the Handlebars tree-sitter grammar rejects: bare
sections, `{{{unescaped}}}`, partials and `{{< parent }}` inheritance.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015D4NsszUG7hy9ghKZ4nfhm