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

hands/reddit/HAND.toml

@@ -836,7 +836,12 @@ Reddit uses a markdown variant. Use these formatting tools appropriately:
 - Include a TL;DR for any post longer than 150 words
 - Place it at the END of the post, preceded by a horizontal rule
 - The TL;DR should be 1-2 sentences that capture the core point
-- Format: `---\n\n**TL;DR:** One or two sentence summary.`
+- Format:
+  ```
+  ---
+
+  **TL;DR:** One or two sentence summary.
+  ```
 
 ## POST TYPE ROTATION