feat: convert from mdbook to Grav format

- Rename src/ to pages/
- Add Grav frontmatter to markdown files
- Create numbered folder structure
- Remove mdbook-specific files

Migration from mdbook to Grav CMS.

pages/02.week-1-plan/default.md

@@ -0,0 +1,32 @@
+---
+title: 'STLP — Week 1 Plan (Tue–Fri)'
+menu: 'STLP — Week 1 Plan (Tue–Fri)'
+---
+
+# STLP — Week 1 Plan (Tue–Fri)
+
+Targets
+- Revenue: $___
+- Leads: ___
+- Orders: ___
+
+Tuesday — Offer + Pipeline
+- Finalize 3 SKUs and prices (from `offers.md`).
+- Draft IG/TikTok copy for 3 reels; shoot first 2.
+- Build outreach list of 30 local businesses (name, contact, email/phone).
+
+Wednesday — Build MVP Slice
+- Publish single-page site with:
+  - Offer menu, quote/order form, Stripe payment links.
+  - Matomo tag; goal tracking for form submit and payment link click.
+- Create Stripe Payment Links for 3 SKUs; test checkout.
+
+Thursday — Publish + Promote
+- Launch post on IG, TikTok, Nextdoor/FB groups; include site link.
+- DM/email 15 local businesses with 1-paragraph offer + CTA.
+- Open booking slots for consults (if used).
+
+Friday — Close + Validate
+- Follow up on all leads; book demos/pickups.
+- Collect payments; fulfill any same-day items if possible.
+- Log KPIs and decide: persist/pivot for next week.