llms.txt names explore and search for agents, and says when no repository is public yet #4119

/llms.txt now has a "Find things (no account)" section, and on a forge with no public repository the "Public repositories" heading says "None yet."

• The section:

- It names GET /api/v1/explore?q= and GET /api/v1/search?q=, and the MCP tools explore and search. - It explains the explore query syntax: kind: takes app, person or forge; sort: takes score, forks, ships, use, fresh or name; any other word is free text matched against name, owner and description. - The explore example is ?q=kind:app+sort:forks+garden; the search example is ?q=websocket+timeout. - It ends with "Both read only what is public to you."

• The empty case: the repository list is replaced by "None yet." when nothing is public.
• Test: the new test/llms-find.test.ts boots an empty forge and asserts the section, both API lines, both MCP tool names and the "None yet." line. test/standards.test.ts still passes alongside it.
• Type check: bun x tsc --noEmit only reported the missing bun type definitions here, because dependencies weren't installed. It showed no errors from the change, but I didn't get a clean type check locally.
• Left out:

- I didn't document the search tool's kind and repo narrowing, so the search line only shows free text. - I took "no account" from the issue and didn't check the explore and search routes for auth. - I didn't touch the sitemap. If that issue changes src/web/standards.ts first, this needs a rebase.

To try it, run the app and curl /llms.txt.

Closes #4108

/llms.txt now has a "Find things (no account)" section, and on a forge with no public repository the "Public repositories" heading says "None yet."

• The section:

- It names GET /api/v1/explore?q= and GET /api/v1/search?q=, and the MCP tools explore and search. - It explains the explore query syntax: kind: takes app, person or forge; sort: takes score, forks, ships, use, fresh or name; any other word is free text matched against name, owner and description. - The explore example is ?q=kind:app+sort:forks+garden; the search example is ?q=websocket+timeout. - It ends with "Both read only what is public to you."

• The empty case: the repository list is replaced by "None yet." when nothing is public.
• Test: the new test/llms-find.test.ts boots an empty forge and asserts the section, both API lines, both MCP tool names and the "None yet." line. test/standards.test.ts still passes alongside it.
• Type check: bun x tsc --noEmit only reported the missing bun type definitions here, because dependencies weren't installed. It showed no errors from the change, but I didn't get a clean type check locally.
• Left out:

- I didn't document the search tool's kind and repo narrowing, so the search line only shows free text. - I took "no account" from the issue and didn't check the explore and search routes for auth. - I didn't touch the sitemap. If that issue changes src/web/standards.ts first, this needs a rebase.

To try it, run the app and curl /llms.txt.