v0.6.0 — llms.txt (experimental)

Added

• llms.txt (experimental). Generates a small-form llms.txt index of all published content across every collection with a urlPattern, grouped by collection label. Exposed on the plugin route llms/txt; serve it from Astro by proxying that route at /llms.txt. Enabled by default — flip the llms.txt (experimental) toggle to disable. Only the plain llms.txt is implemented; the llms-full.txt variant is out of scope.
• buildLlmsTxt() exported for consumers who want to assemble the body from getEmDashCollection() results with custom sectioning or ordering.