Splits monolithic agent instructions into a slim AGENTS.md hub plus
docs/agents/ topic files (philosophy, architecture, components, contracts,
testing, anti-patterns) so AI coding agents have a single source of truth
for how the project thinks. Removes the .cursor/rules/ directory; AGENTS.md
is now the only agent-facing doc.
Fixes the long-standing pointer to the empty src/backend/base/langflow/components/
stubs (real components live in src/lfx/src/lfx/components/) and corrects
the v2 API description from 'future' to its actual mounted state.
