Bug: `pyrite sw new-adr` prints instructions but does not create file

Problem

Running `pyrite sw new-adr "Some Title" --status accepted` prints the file path and frontmatter to stdout but does not actually create the markdown file on disk. The user is left to create the file manually.

Expected Behavior

The command should create the ADR file in the KB's `adrs/` directory with correct frontmatter and a body template (Context/Decision/Consequences sections), then index the new entry.

Steps to Reproduce

```bash pyrite sw new-adr "Test ADR" --status proposed

Output shows file path and frontmatter but no file is created

Fix

The `new_adr` command in `extensions/software-kb/src/pyrite_software_kb/cli.py` needs to actually write the file using KBRepository or KBService, not just print instructions.