update reports to v2.1.84 — shell field, initialPrompt, /fast syntax + workflow changelogs
Commands: add `shell` frontmatter field (bash/powershell), update /fast to /fast [on|off], bump to 12 fields.
Skills: add `shell` frontmatter field, bump to 12 fields.
Subagents: add `initialPrompt` frontmatter field, bump to 16 fields.
Settings: add WebFetch and MCP permission rules for workflow domains.
Changelogs: append v2.1.84 entries for commands, skills, subagents, concepts, and development workflows.
Co-Authored-By: Claude <noreply@anthropic.com>