Add Grafana Alloy configuration files and update examples

- Introduced detailed configuration guidelines in alloy.instructions.md
- Added general instructions for project structure in general.instructions.md
- Created config.yaml for NAMU-PC with target hostnames
- Implemented example.alloy and openwrt.alloy for service discovery and scraping
- Added alloy_seed.json for initial configuration state
- Developed demo.alloy for comprehensive monitoring setup
- Established std.alloy for repository path formatting and host configuration loading
- Updated test.alloy to utilize new host configuration loading

data-alloy/alloy_seed.json

@@ -0,0 +1 @@
+{"UID":"960d41f5-980d-4a15-9eed-fa371d06f79d","created_at":"2025-08-01T16:05:56.172604+03:00","version":"v1.10.0"}