fix: block internal files from mintlify publish

[WH-2099]

Summary

• expand .mintignore to ignore internal-only root files and internal workflow directories from the docs publish surface
• explicitly ignore non-public utility files that live under otherwise public asset directories
• convert CLAUDE.md into a symlink to AGENTS.md and add a rule requiring internal-only files to be covered by .mintignore

Why

Some non-public repository files were directly accessible from the published Mintlify site because the ignore coverage was incomplete. This change narrows the public publish surface and keeps agent instructions in sync through a single source of truth.

Impact

• reduces the chance of exposing internal instructions, tooling metadata, and maintenance utilities on docs.dify.ai
• prevents instruction drift between AGENTS.md and CLAUDE.md

Validation

• git diff --cached --check
• verified current production exposure with curl before the change
• did not run a local Mintlify build in this branch

Closes #743

[mintlify]

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Project	Status	Preview	Updated (UTC)
dify-core-product	🟢 Ready	View Preview	Apr 12, 2026, 1:12 PM

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