Add workflows command for reusable deep research templates

[yorkeccak]

Summary

Adds a new valyu workflows command for reusable, versioned deep research templates. A workflow is a saved prompt, research strategy, report format, deliverables, and recommended mode with typed {variables}. Fill in the variables and run one to start a normal deep research task - same auth, billing, and lifecycle as a freeform task.

Two scopes: curated Valyu templates available to everyone (read-only), and org templates each organization creates and versions privately.

Command surface

valyu workflows
├── list [--vertical --scope --search --tag --limit --expand]   discover templates
├── get <slug> [--version N]                                    full template detail + variables
├── versions <slug>                                             version history
├── preview <slug> [--param k=v ...]                            resolve template, no credits spent
├── run <slug> [--param k=v ...] [-m mode] [--version N] [-w]   run -> starts a deepresearch task
├── create --file <path>                                        create an org template (JSON)
├── update <slug> --file <path>                                 edit metadata / publish a new version
└── delete <slug> [-y]                                          delete an org template

run reuses the existing deepresearch watch loop, so --watch streams progress and valyu deepresearch status/watch <id> track it like any other task.

Implementation

• src/commands/workflows/index.ts - the new command (8 subcommands).
• src/lib/client.ts - workflow client methods + types; adds a PATCH helper to the request layer.
• src/cli.ts - registers the command and adds a top-level example.
• src/commands/deepresearch/index.ts - exports watchResearch for reuse by workflows run.
• Docs: README section, SKILL.md command tree/table, new skills/valyu-cli/references/workflows.md.
• Version bumped to 1.1.0 (package.json, version.ts, SKILL synced).

Testing

• pnpm build / pnpm typecheck / pnpm test all pass (45 tests, 9 new covering the workflow client methods, query-string building, PATCH/DELETE verbs, and run-override behaviour).
• Live-tested against the production API: listed all curated templates, verified get / versions / preview response shapes, and ran a real workflow (fast mode) end-to-end which created a task with the expected workflow linkage, then cancelled it.

Notes for reviewers

• Param values from --param key=value are coerced to number/boolean when they look like one; --params-file (or --params-file - for stdin) preserves exact JSON for awkward values.
• Slugs are URL-encoded in paths to support org-prefixed (org/name) slugs.
• run only forwards overrides (mode, version, webhook, alert-email) when explicitly provided, so a template's own recommended mode and output formats apply by default.

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