feat(eccdb): introduce EnTT database and public API

[edgeuni]

Summary

This PR introduces the EccDB database implementation on top of the existing
ecc-tools database codebase.

The implementation provides an EnTT-based database core, a standalone public
API, LEF/DEF/iDB I/O adapters, and a clearer separation between public
interfaces and internal storage.

The PR targets:

openecos-projects:eccdb/refactor_eccdb_v1

Main Changes

• Introduce the EccDB database module and a standalone eccdb namespace.

• Add an EnTT-based storage implementation for:

  • technology data;
  • library data;
  • design data;
  • geometry and routing pools.

• Add strongly typed database IDs and public value/data types.

• Add the public EccDB API under src/database/eccdb/include/eccdb.

• Add database configuration, CRUD, routing, design, and reference APIs.

• Reorganize the implementation into:

  • api;
  • storage;
  • io;
  • adapters;
  • tests;
  • benchmarks.

• Move LEF, DEF, iDB, and binary import/export code into the new I/O layout.

• Add EccDB adapter integration for iRT and iDRC.

• Extend legacy iDB LEF58 property parsing and materialization.

• Add standalone EccDB CMake configuration and installation support.

• Add bilingual documentation covering API usage, architecture, and differential testing.

• Add and update unit, I/O, memory, and differential test targets.