feat: composite actions + runner base image

Actions: checkout, setup-go, setup-node, setup-aws
Runner image: Go 1.26 + Node 22 + AWS CLI + Docker (docker:29-dind)

setup-aws/action.yml

@@ -0,0 +1,41 @@
+name: 'Tinqs Setup AWS'
+description: 'Install AWS CLI and optionally login to ECR'
+
+inputs:
+  region:
+    description: 'AWS region'
+    default: 'eu-west-1'
+  ecr-login:
+    description: 'Login to ECR (true/false)'
+    default: 'false'
+  ecr-repo:
+    description: 'ECR repository URL (required if ecr-login is true)'
+    default: ''
+
+runs:
+  using: 'composite'
+  steps:
+    - run: |
+        REGION="${{ inputs.region }}"
+        ECR_LOGIN="${{ inputs.ecr-login }}"
+        ECR_REPO="${{ inputs.ecr-repo }}"
+
+        # Install AWS CLI if missing
+        if ! command -v aws &>/dev/null; then
+          echo "Installing AWS CLI..."
+          curl -fsSL https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip -o /tmp/awscli.zip
+          unzip -q /tmp/awscli.zip -d /tmp/aws-install
+          /tmp/aws-install/aws/install
+          rm -rf /tmp/awscli.zip /tmp/aws-install
+        fi
+
+        aws --version
+
+        # ECR login
+        if [ "$ECR_LOGIN" = "true" ] && [ -n "$ECR_REPO" ]; then
+          echo "Logging into ECR ($REGION)..."
+          aws ecr get-login-password --region "$REGION" | \
+            docker login --username AWS --password-stdin "$ECR_REPO"
+          echo "ECR login OK"
+        fi
+      shell: bash