chore: add Go repo norms (badges, contributing, lint, taskfile, editorconfig)

Co-Authored-By: Virgil <virgil@lethean.io>

.editorconfig

@@ -0,0 +1,12 @@
+root = true
+
+[*]
+charset = utf-8
+indent_style = tab
+indent_size = 4
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{md,yml,yaml,json,txt}]
+indent_style = space
+indent_size = 2

.golangci.yml

@@ -0,0 +1,22 @@
+run:
+  timeout: 5m
+  go: "1.26"
+
+linters:
+  enable:
+    - govet
+    - errcheck
+    - staticcheck
+    - unused
+    - gosimple
+    - ineffassign
+    - typecheck
+    - gocritic
+    - gofmt
+  disable:
+    - exhaustive
+    - wrapcheck
+
+issues:
+  exclude-use-default: false
+  max-same-issues: 0

CONTRIBUTING.md

@@ -0,0 +1,35 @@
+# Contributing
+
+Thank you for your interest in contributing!
+
+## Requirements
+- **Go Version**: 1.26 or higher is required.
+- **Tools**: `golangci-lint` and `task` (Taskfile.dev) are recommended.
+
+## Development Workflow
+1. **Testing**: Ensure all tests pass before submitting changes.
+   ```bash
+   go test ./...
+   ```
+2. **Code Style**: All code must follow standard Go formatting.
+   ```bash
+   gofmt -w .
+   go vet ./...
+   ```
+3. **Linting**: We use `golangci-lint` to maintain code quality.
+   ```bash
+   golangci-lint run ./...
+   ```
+
+## Commit Message Format
+We follow the [Conventional Commits](https://www.conventionalcommits.org/) specification:
+- `feat`: A new feature
+- `fix`: A bug fix
+- `docs`: Documentation changes
+- `refactor`: A code change that neither fixes a bug nor adds a feature
+- `chore`: Changes to the build process or auxiliary tools and libraries
+
+Example: `feat: add new endpoint for health check`
+
+## License
+By contributing to this project, you agree that your contributions will be licensed under the **European Union Public Licence (EUPL-1.2)**.