docs: add LLM.md project guide

LLM.md

@@ -0,0 +1,38 @@
+# LLM.md - Hanzo Zapdb
+
+## Overview
+Go module: github.com/luxfi/zapdb/v4
+
+## Tech Stack
+- **Language**: Go
+
+## Build & Run
+```bash
+go build ./...
+go test ./...
+```
+
+## Structure
+```
+zapdb/
+  CHANGELOG.md
+  CODE_OF_CONDUCT.md
+  CONTRIBUTING.md
+  LICENSE
+  Makefile
+  README.md
+  SECURITY.md
+  VERSIONING.md
+  backup.go
+  backup_test.go
+  badger/
+  batch.go
+  batch_test.go
+  changes.sh
+  compaction.go
+```
+
+## Key Files
+- `README.md` -- Project documentation
+- `go.mod` -- Go module definition
+- `Makefile` -- Build automation