feat(workflows): expand template library from 9 to 22 + multiline string cleanup (#36)

* feat(workflows): add 13 workflow templates across engineering, business, and productivity

Engineering:
- bug-triage: reproduce path → root cause → fix plan
- api-design: resource model → endpoints → OpenAPI spec
- incident-postmortem: timeline → RCA → full postmortem report
- test-generation: code analysis → edge cases → full test suite
- refactor-plan: smell analysis → prioritised opportunities → migration plan

Business:
- competitor-analysis: profiles → SWOT → strategy report
- product-spec: problem definition → user stories → full PRD
- market-research: landscape → segments → research report

Productivity/Thinking:
- meeting-summary: raw notes → structured summary → follow-up email
- decision-matrix: criteria → weighted scoring → recommendation memo
- learning-plan: gap analysis → roadmap → week-1 day-by-day plan
- job-application: job analysis → tailored resume → cover letter → interview prep
- blog-post: research → outline → draft → SEO optimisation

Closes #1912 on librefang/librefang

* fix(workflows): overhaul existing 9 templates

- data-pipeline: redesigned — original 'extract from URL' step was
  broken (LLMs cannot fetch URLs); replaced with paste-data approach
  (profile → clean_transform → analyse) with analysis_goal parameter
- translate-polish: added target_language and register parameters;
  added back-translation step for accuracy verification
- weekly-report: added team/audience parameters, richer extraction
  step, added Metrics and Notes sections
- content-pipeline: added audience/tone parameters, added outline step
  between research and writing
- content-review: fix category 'content' → 'creation'
- customer-support: fix category 'support' → 'business'

* style(workflows): convert all prompt_template strings to TOML multiline syntax

Replace \n escape sequences with real newlines using triple-quote
multiline strings ("""...""") across all 22 workflow templates.
No content changes — formatting only.

* style(hands): replace \n escape in reddit writer format example with multiline code block

workflows/market-research.toml

@@ -0,0 +1,86 @@
+id = "market-research"
+name = "Market Research Report"
+description = "Analyse a market opportunity: size, trends, customer segments, key players, and go-to-market entry points."
+category = "business"
+tags = ["market", "research", "strategy", "business"]
+
+[i18n.zh]
+name = "市场调研报告"
+description = "分析市场机会：市场规模、趋势、客户细分、主要参与者和进入市场的切入点。"
+
+[[parameters]]
+name = "market"
+description = "The market or industry to research"
+param_type = "string"
+required = true
+
+[[parameters]]
+name = "business_context"
+description = "Your company, product, or investment thesis context"
+param_type = "string"
+required = false
+default = ""
+
+[[steps]]
+name = "market_landscape"
+prompt_template = """
+You are a market research analyst. Map the current landscape for: {{market}}
+
+1. **Market definition** — precise scope and adjacent markets
+2. **Market size** — TAM, SAM, SOM estimates with methodology
+3. **Growth rate** — historical and projected CAGR
+4. **Maturity stage** — emerging / growth / mature / declining
+5. **Key trends** — top 5 forces shaping the market (technology, regulation, behaviour)
+6. **Geographic distribution** — where activity is concentrated
+
+Context: {{business_context}}
+"""
+
+[[steps]]
+name = "customer_segments"
+prompt_template = """
+Identify and profile the customer segments in this market:
+
+For each segment (aim for 3-5):
+- Name and size
+- Demographics/firmographics
+- Key pain points and jobs-to-be-done
+- Current solutions they use
+- Willingness to pay signals
+- Acquisition channels
+- Which segment is most underserved
+
+Market landscape:
+{{market_landscape}}
+"""
+depends_on = ["market_landscape"]
+
+[[steps]]
+name = "research_report"
+prompt_template = """
+Write a structured market research report:
+
+## Executive Summary
+3 bullet points: opportunity, risk, recommended entry point.
+
+## Market Overview
+## Customer Segments
+## Competitive Landscape
+Top players by segment, their moats and vulnerabilities.
+
+## Market Entry Analysis
+- Best beachhead segment
+- Entry barriers and how to overcome them
+- Differentiation opportunities
+- Estimated time to meaningful traction
+
+## Key Risks
+## Recommended Next Steps
+
+Market landscape:
+{{market_landscape}}
+
+Customer segments:
+{{customer_segments}}
+"""
+depends_on = ["market_landscape", "customer_segments"]