add badges

Author: bw-hro

readme.md

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+[project_name]: sqlitemap
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 # sqlitemap — Persistent Map Backed by SQLite
 
+[![CI Ubuntu](https://github.com/bw-hro/sqlitemap/actions/workflows/ubuntu.yml/badge.svg?branch=main)](https://github.com/bw-hro/sqlitemap/actions/workflows/ubuntu.yml)
+[![CI Windows](https://github.com/bw-hro/sqlitemap/actions/workflows/windows.yml/badge.svg?branch=main)](https://github.com/bw-hro/sqlitemap/actions/workflows/windows.yml)
+[![CI macOS](https://github.com/bw-hro/sqlitemap/actions/workflows/macos.yml/badge.svg?branch=main)](https://github.com/bw-hro/sqlitemap/actions/workflows/macos.yml)
+[![code coverage](https://bw-hro.github.io/sqlitemap/coverage-report/badge.svg)](https://bw-hro.github.io/sqlitemap/coverage-report)
+[![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/bw-hro/sqlitemap/main/LICENSE.txt)
+[![GitHub Releases](https://img.shields.io/github/release/bw-hro/sqlitemap.svg)](https://github.com/bw-hro/sqlitemap/releases)
+[![Vcpkg Version](https://img.shields.io/vcpkg/v/sqlitemap)](https://vcpkg.link/ports/sqlitemap)
+
+
 **sqlitemap** is a lightweight C++ wrapper around SQLite that provides a simple, map-like interface.  
 It’s designed to make working with key-value storage easy and convenient — similar to how [sqlitedict](https://github.com/piskvorky/sqlitedict) works in the Python world.