Initial commit: SRDB - High-performance LSM-Tree database

- Core engine with MemTable, SST, WAL
- B+Tree indexing for SST files  
- Leveled compaction strategy
- Multi-table database management
- Schema validation and secondary indexes
- Query builder with complex conditions
- Web UI with HTMX for data visualization
- Command-line tools for diagnostics

go.mod

@@ -0,0 +1,10 @@
+module code.tczkiot.com/srdb
+
+go 1.24.0
+
+require (
+	github.com/edsrzf/mmap-go v1.1.0
+	github.com/golang/snappy v1.0.0
+)
+
+require golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e // indirect