feat: add golangci-lint and restore megalinter config (#22)

* feat: add golangci-lint and restore megalinter config

* chore: fix linting, go mod tidy

* fix(ci): add golangci-lint action setup to test.yml

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* chore: tweaks

* fix(ci): tweaks

* fix(ci): disable go_golangci_lint in megalinter

* chore: yamllint rules

* chore(ci): tweak yml

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

.github/README.md

@@ -73,6 +73,7 @@ Clone the repository and build the project:
 git clone https://github.com/ivuorinen/go-test-sarif-action.git
 cd go-test-sarif-action
 go build -o go-test-sarif ./cmd/main.go
+go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
 ```
 
 Run tests:
@@ -81,6 +82,13 @@ Run tests:
 go test ./...
 ```
 
+Run linting:
+
+```sh
+go vet ./...
+golangci-lint run
+```
+
 ## 📄 License
 
 This project is licensed under the **MIT License**.

.github/workflows/test.yml

@@ -1,3 +1,4 @@
+---
 name: Run Go Tests and Generate SARIF
 
 on:
@@ -23,6 +24,15 @@ jobs:
         with:
           go-version-file: "go.mod"
 
+      - name: Install golangci-lint
+        uses: golangci/golangci-lint-action@4afd733a84b1f43292c63897423277bb7f4313a9 # v8.0.0
+        with:
+          version: latest
+
+      - name: Run Linters
+        run: |
+          go vet ./...
+          golangci-lint run
       - name: Run Go Tests
         shell: bash
         run: go test -json ./... > go-test-results.json