ci: add GitHub Actions workflow and README badges

Author: Saveliy Yudin

.github/workflows/ci.yml

@@ -0,0 +1,46 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go-version: ['1.25']
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go-version }}
+
+      - name: Run tests
+        run: go test -race -coverprofile=coverage.out -covermode=atomic ./...
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          files: coverage.out
+          token: ${{ secrets.CODECOV_TOKEN }}
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.25'
+
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v6
+        with:
+          version: latest

README.md

@@ -1,6 +1,13 @@
 # maxigo-client
 
-  Idiomatic Go HTTP client for [Max Bot API](https://dev.max.ru) (OpenAPI schema v0.0.10). Zero external dependencies.
+[![Go Reference](https://pkg.go.dev/badge/github.com/maxigo-bot/maxigo-client.svg)](https://pkg.go.dev/github.com/maxigo-bot/maxigo-client)
+[![Go Report Card](https://goreportcard.com/badge/github.com/maxigo-bot/maxigo-client)](https://goreportcard.com/report/github.com/maxigo-bot/maxigo-client)
+[![CI](https://github.com/maxigo-bot/maxigo-client/actions/workflows/ci.yml/badge.svg)](https://github.com/maxigo-bot/maxigo-client/actions/workflows/ci.yml)
+[![codecov](https://codecov.io/gh/maxigo-bot/maxigo-client/branch/main/graph/badge.svg)](https://codecov.io/gh/maxigo-bot/maxigo-client)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![Go Version](https://img.shields.io/github/go-mod/go-version/maxigo-bot/maxigo-client)](https://github.com/maxigo-bot/maxigo-client)
+
+Idiomatic Go HTTP client for [Max Bot API](https://dev.max.ru) (OpenAPI schema v0.0.10). Zero external dependencies.
 
 ## Why This Project?