Support Multiple Tag Patterns

[spboyer]

Description

Support pushing images with multiple tags in a single operation.

Proposed Implementation

• Accept multiple --tag flags
• Push all tags simultaneously
• Support tag patterns (e.g., v1, v1.2, v1.2.3, latest)
• Auto-generate semantic version tags

Use Cases

• Tagging with both version and 'latest'
• Semantic versioning (major, minor, patch tags)
• Branch-based tagging

Example

pycontainer build --tag myapp:latest --tag myapp:v1.2.3 --tag myapp:v1

Priority

Medium - Convenience feature.

Parent: #57