feat: initial Argus - AI-powered FinOps agent

Argus is an all-seeing eye on your AWS costs:
- Scan for optimization opportunities (unused resources, oversized instances)
- Evaluate Terraform plans for cost impact
- Generate weekly/monthly cost reports
- Integrate with Atlantis for pre-apply cost analysis

Components:
- CLI tool (argus scan/evaluate/report)
- GitHub Action for CI/CD integration
- AWS Scanner for resource analysis
- AI engine for intelligent recommendations

Features:
- Unused EBS volumes, idle EC2, oversized RDS
- Cost delta on Terraform changes
- Atlantis integration
- Slack/email notifications

LICENSE

@@ -0,0 +1,15 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.