feat: Terraform Foundation - AWS Landing Zone

Enterprise-grade multi-tenant AWS cloud foundation.

Modules:
- GitHub OIDC for keyless CI/CD authentication
- IAM account settings and security baseline
- AWS Config Rules for compliance
- ABAC (Attribute-Based Access Control)
- SCPs (Service Control Policies)

Features:
- Multi-account architecture
- Cost optimization patterns
- Security best practices
- Comprehensive documentation

Tech: Terraform, AWS Organizations, IAM Identity Center

.yamllint.yml

@@ -0,0 +1,41 @@
+# yamllint configuration
+# https://yamllint.readthedocs.io/
+
+extends: default
+
+rules:
+  # Allow long lines (common in Terraform/CI configs)
+  line-length:
+    max: 200
+    level: warning
+
+  # Allow inline comments
+  comments:
+    min-spaces-from-content: 1
+
+  # Relaxed indentation for readability
+  indentation:
+    spaces: 2
+    indent-sequences: consistent
+
+  # Allow document start without ---
+  document-start: disable
+
+  # Truthy values (allow yes/no/on/off)
+  truthy:
+    allowed-values: ['true', 'false', 'yes', 'no', 'on', 'off']
+
+  # Braces spacing
+  braces:
+    min-spaces-inside: 0
+    max-spaces-inside: 1
+
+  # Brackets spacing
+  brackets:
+    min-spaces-inside: 0
+    max-spaces-inside: 1
+
+ignore: |
+  .terraform/
+  **/.terraform/
+  node_modules/