add readme in docs:

docs/README.md

@@ -0,0 +1,12 @@
+# Technical Documentation
+
+This directory contains technical documentation for MeshView that goes beyond initial setup and basic usage.
+
+These documents are intended for developers, contributors, and advanced users who need deeper insight into the system's architecture, database migrations, and internal workings.
+
+## Contents
+
+- [ALEMBIC_SETUP.md](ALEMBIC_SETUP.md) - Database migration setup and management
+- [TIMESTAMP_MIGRATION.md](TIMESTAMP_MIGRATION.md) - Details on timestamp schema changes
+
+For initial setup and basic usage instructions, please see the main [README.md](../README.md) in the root directory.