docs: replace stub README, add proper README and CHANGELOG per itpp-standards template

- Rewrote README.md following itpp-standards Section 2.1 template
- Updated CHANGELOG.md to standard format
- Added .gitea/workflows/docs-check.yml for docs CI

README.md

@@ -1,7 +1,33 @@
 # LaunchCheck
 
-> **Status:** Specification & Architecture — pre-MVP
-> **Started:** July 25, 2026
+> **Owner:** Germaine | **Status:** PLANNED
+> **Last Updated:** 2026-08-09
 > **Tagline:** Validate your idea before you build it.
 
-Startup validation t...[truncated]
+LaunchCheck is a startup validation SaaS built for pre-revenue founders who need to understand their competitive landscape before writing code. It delivers competitive landscape reports, pricing comparisons, feature benchmarking, OSINT dossiers on key competitors, and investor-ready summary PDFs — powered by the Super Search v2 engine that drives IntelSight, IT Pro Partner's enterprise-grade intelligence platform.
+
+## What's Inside
+
+- `docs/` — Product documentation and research
+  - `competitive-analysis.md` — Full competitive landscape for IntelSight (enterprise CI) and LaunchCheck (startup validation)
+  - `launchcheck-business-proposal.md` — Business proposal with market analysis, revenue model, GTM strategy, and financial projections
+
+## Tech Stack
+
+- **Platform:** IntelSight shared infrastructure — Super Search v2 + Premium APIs + LLM Synthesis
+- **Backend:** TBD — FastAPI or equivalent
+- **Frontend:** TBD
+- **Target Pricing:** $49/month
+
+## Quick Start
+
+```bash
+git clone https://git.itpropartner.com/ippadmin/launchcheck.git
+cd launchcheck
+# Review docs/ for product spec and competitive analysis
+```
+
+## Related
+
+- [itpp-infrastructure](https://git.itpropartner.com/ippadmin/itpp-infrastructure) — server inventory, DNS
+- [itpp-standards](https://git.itpropartner.com/ippadmin/itpp-standards) — docs standards and templates