fix(llms): serve well-formed llms.txt, remove Mothership + dead static files

Both the marketing site and docs site's llms.txt validator errors ("does
not appear to contain any links") traced to the same root cause: a static
public/llms.txt shadowed a better-written, already-existing dynamic
app/llms.txt route, and every "link" in the static files (and in the
docs app's auto-generated route) was bare `label: url` text, not Markdown
link syntax - so a strict Markdown-link parser found zero matches even
though URLs were visibly present.

- apps/sim: delete public/llms.txt (dead code, shadowing the properly
  Markdown-linked app/llms.txt route.ts, confirmed via production headers
  showing the static file was what actually served). Fix llms-full.txt's
  Links/Support/Legal sections to use [label](url) syntax, correct a
  stale "Next.js 15" reference, and replace "Mothership" with "Chat" per
  the constitution's language rules.
- apps/docs: same shadowing issue - delete the orphaned public/llms.txt
  (also still said "Mothership"). Fix the auto-generated per-page link
  list in app/llms.txt/route.ts to emit [title](url) instead of
  "title: url" for every documentation page.

apps/docs/public/llms.txt

@@ -1,51 +0,0 @@
-# Sim Documentation
-
-Sim is the open-source AI workspace where teams build, deploy, and manage AI agents. Create agents visually with the workflow builder, conversationally through Mothership, or programmatically with the API — connected to 1,000+ integrations and every major LLM.
-
-## What is Sim?
-
-Sim provides a complete AI workspace including:
-- Mothership — natural language agent creation and workspace management
-- Visual workflow builder with drag-and-drop interface
-- 1,000+ built-in integrations (OpenAI, Anthropic, Slack, Gmail, GitHub, etc.)
-- Knowledge bases for retrieval-augmented generation
-- Built-in tables for structured data
-- Real-time team collaboration
-- Multiple deployment options (cloud-hosted or self-hosted)
-- Custom integrations via MCP protocol
-
-## Main Documentation Sections
-
-Here are the key areas covered in our documentation:
-
-/introduction - Getting started with Sim AI workspace
-/getting-started - Quick start guide for building your first agent
-/blocks - Understanding blocks (AI agents, APIs, functions)
-/tools - 1,000+ integrations and tools
-/webhooks - Webhook triggers and handling
-/mcp - Custom integrations via MCP protocol
-/deployment - Cloud-hosted vs self-hosted deployment
-/permissions - Team collaboration and workspace management
-/collaboration - Real-time editing and team features
-/workflows - Building agent logic with the visual builder
-
-## Technical Information
-
-- Framework: Fumadocs (Next.js-based documentation platform)
-- Content: MDX files with interactive examples
-- Languages: English (primary), Spanish, French, German, Japanese, Chinese
-- Search: AI-powered search and assistance available
-
-## Complete Documentation
-
-For the full documentation with all pages, examples, and interactive features, visit our documentation site. We also provide machine-readable versions at /llms.txt (full content) for AI systems.
-
-## Additional Resources
-
-- GitHub repository with agent examples
-- Discord community for support and discussions
-- 1,000+ built-in integrations with detailed guides
-- MCP protocol documentation for custom integrations
-- Self-hosting guides and Docker deployment
-
-For the complete documentation visit https://docs.sim.ai

apps/sim/public/llms.txt

@@ -1,59 +0,0 @@
-# Sim
-
-Sim is the open-source AI workspace where teams build, deploy, and manage AI agents. Create agents visually with the workflow builder, conversationally through Chat, or programmatically with the API — connected to 1,000+ integrations and every major LLM.
-
-## Key Facts
-
-- Website: https://sim.ai
-- GitHub: https://github.com/simstudioai/sim
-- Documentation: https://docs.sim.ai
-- License: Apache 2.0
-- Category: AI workspace, AI agent builder, developer tools
-- Trusted by: 100,000+ builders, from startups to Fortune 500
-
-## What Sim Does
-
-Sim is a unified AI workspace with these core modules:
-
-- **Mothership** — AI command center. Build and manage everything in natural language.
-- **Workflows** — Visual builder. Connect blocks, models, and integrations into agent logic.
-- **Knowledge Base** — Upload docs, sync sources, build vector databases for agent memory.
-- **Tables** — Built-in database. Store, query, and wire structured data into agent runs.
-- **Files** — Upload, create, and share documents across your team and agents.
-- **Logs** — Full execution tracing. Inputs, outputs, cost, and duration for every run.
-
-## Capabilities
-
-- 1,000+ integrations (Slack, Gmail, GitHub, Notion, Jira, Salesforce, HubSpot, and more)
-- Every major LLM: OpenAI, Anthropic, Google Gemini, xAI Grok, Mistral, Groq, Cerebras
-- Real-time team collaboration with multiplayer editing
-- Enterprise governance: RBAC, staging/production environments, deployment versioning, audit logs
-- Self-hosting via Docker, bring-your-own-key (BYOK) for all model providers
-- API, CLI, and SDK access (TypeScript, Python)
-- MCP (Model Context Protocol) server creation and connection
-- SOC2 compliant
-
-## Key Pages
-
-- AI Models Directory: https://sim.ai/models
-- Integrations: https://sim.ai/integrations
-- Pricing: https://sim.ai/#pricing
-- Partners: https://sim.ai/partners
-
-## Blog
-
-The Sim blog covers announcements, technical deep-dives, and guides for building AI agents.
-
-- Blog: https://sim.ai/blog
-- RSS: https://sim.ai/blog/rss.xml
-
-## Documentation
-
-- Getting Started: https://docs.sim.ai/getting-started
-- Blocks: https://docs.sim.ai/workflows
-- Tools & Integrations: https://docs.sim.ai/integrations
-- Webhooks: https://docs.sim.ai/workflows/triggers/webhook
-- MCP Protocol: https://docs.sim.ai/agents/mcp
-- Self-Hosting: https://docs.sim.ai/platform/self-hosting
-- API Reference: https://docs.sim.ai/api-reference/getting-started
-- SDKs: https://docs.sim.ai/api-reference