docs: add task-steering middleware integration (js)

[Edvin Hallvaxhiu (edvinhallvaxhiu)]

Overview

Adds langchain-task-steering to the community middleware integrations table. Task-steering is an implicit state-machine middleware that turns
an ordered list of tasks into an enforced pipeline inside any LangChain agent, with per-task tool scoping, dynamic prompt injection, and composable completion validation.

Type of change

Type: Update existing documentation

Related issues/PRs

• GitHub issue: N/A
• Feature PR: N/A

Checklist

• I have read the contributing guidelines, including the language policy
• I have tested my changes locally using docs dev
• All code examples have been tested and work correctly
• I have used root relative paths for internal links
• I have updated navigation in src/docs.json if needed

Additional notes

This adds a single row to the community middleware table. The package provides ordered task pipelines where the model drives its own transitions
via an update_task_status tool while the middleware enforces ordering, scopes tools per task, injects a live status board into the system prompt, and gates completion through
pluggable validators.

Source: https://github.com/edvinhallvaxhiu/langchain-task-steering