Add support for Hoosh coding agent

[armingjazi]

Summary

This PR adds full support for the
https://nomad-prime.github.io/hoosh-docs/ coding agent to Spec Kit.
Hoosh is a powerful command-line AI assistant built in Rust that supports
multiple LLM backends (OpenAI Compatible Providers, Anthropic, Together AI, Ollama).

Changes

Core Integration

• Agent Configuration (src/specify_cli/init.py)
  • Added hoosh to AGENT_CONFIG with CLI tool hoosh, directory .hoosh/,
    and installation URL
  • Updated --ai parameter help text to include hoosh

Documentation

• README.md: Added Hoosh to the Supported AI Agents table
• AGENTS.md:
  • Added Hoosh to Current Supported Agents table
  • Listed under CLI-Based Agents section
  • Included in Markdown format usage documentation

Release Infrastructure

• create-release-packages.sh:
  • Added hoosh to ALL_AGENTS array
  • Added build configuration for .hoosh/commands/ with Markdown format
  • Updated usage documentation
• create-github-release.sh:
  • Added hoosh-sh and hoosh-ps template packages to GitHub releases

Agent Context Scripts

• scripts/bash/update-agent-context.sh:
  • Added HOOSH_FILE variable pointing to AGENTS.md
  • Added hoosh case to agent-specific update logic
  • Added hoosh to all-agents update flow
  • Updated usage documentation
• scripts/powershell/update-agent-context.ps1:
  • Added $HOOSH_FILE variable
  • Added hoosh to ValidateSet parameter
  • Added hoosh switch case
  • Updated documentation

Hoosh Integration Details

• Command Directory: .hoosh/commands/
• File Format: Markdown with YAML frontmatter
• Argument Placeholder: $ARGUMENTS
• Command Invocation: Slash commands (e.g., /speckit.plan)
• Frontmatter Fields: description, handoffs (optional), tags (optional)

Testing

Tested by examining the hoosh codebase at ../nomad-prime/hoosh to verify:

• Command file format and structure
• Directory conventions (.hoosh/commands/)
• YAML frontmatter parsing requirements
• Argument placeholder syntax

References

• Hoosh Documentation: https://nomad-prime.github.io/hoosh-docs/
• Hoosh GitHub Repository: https://github.com/nomad-prime/hoosh