feat: add D.intelligence Agent Corps (9 skills + shared infra)

Add 9 agent skills (#70-#77, #88) for D.intelligence business operations:
brand guardian, brand editor, doc secretary, quotation manager, service
architect, marketing manager, back office manager, account manager, and
skill update meta-agent. Includes shared Python package (dintel), reference
docs, document/quotation templates, service module CSVs, cross-device
installer, and comprehensive user guide.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

custom-skills/73-dintel-quotation-mgr/README.md

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+# 73-dintel-quotation-mgr
+
+> **Agent #73** | `dintel-quotation-mgr` v1.0.0 | D.intelligence Agent Corps
+
+Quotation Manager -- the most complex skill in the D.intelligence Agent Corps. Uses a multi-agent sub-system (Scope, Resource, Pricing, Output) to generate professional quotations and estimates for D.intelligence service modules.
+
+## Autonomy Level
+
+**Draft & Wait** -- Generates a quote draft in branded Excel (.xlsx), then waits for Andrew's review. Andrew reviews in Google Sheets and leaves cell comments for feedback. The agent reads feedback and learns patterns over time via `shared/feedback-log.md`.
+
+## Multi-Agent Sub-System
+
+| Sub-Agent | Role |
+|-----------|------|
+| **Scope Agent** | Analyzes client requirements, maps to service modules (A1--G4) |
+| **Resource Agent** | Estimates effort hours, timeline, team allocation |
+| **Pricing Agent** | Calculates pricing using module rates, package discounts, discount policies |
+| **Output Generator** | Produces branded Excel .xlsx file using `dintel-shared/src/dintel/excel.py` |
+
+## Directory Structure
+
+```
+73-dintel-quotation-mgr/
+├── code/
+│   ├── CLAUDE.md              # Claude Code instructions
+│   └── scripts/
+│       └── generate_quotation.py   # Excel generation script stub
+├── desktop/
+│   └── SKILL.md               # Full skill definition (sub-agents, pricing, workflow)
+├── shared/
+│   ├── pricing-reference.md   # Pricing quick reference
+│   └── feedback-log.md        # Learning from Andrew's corrections
+└── README.md                  # This file
+```
+
+## Key References
+
+- Brand Guide: `../../dintel-shared/src/dintel/brand.py`
+- Excel utilities: `../../dintel-shared/src/dintel/excel.py`
+- Service Map: `/Users/ourdigital/Documents/D.intelligence Service Package/00_SERVICE-MAP.md`
+- Pricing Packages: `/Users/ourdigital/Documents/D.intelligence Service Package/06_PRICING-PACKAGES.md`
+
+## Universal Guardrails
+
+1. Never send to clients without Andrew's approval
+2. Never delete -- always archive
+3. **Never commit pricing without Andrew's sign-off** (CRITICAL)
+4. Korean-first, jargon = 한글(English) bilingual notation
+5. Never cross-reference client data without consent