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

OpenWRT/openwrt.alloy

@@ -0,0 +1,7 @@
+declare "openwrt" {
+	argument "forward_to" {
+		optinal = false
+		comment = "Where to forward the scraped metrics"
+	}
+
+}