feat: signoz package and deprecation of frontend, alertmanager (#7301)

### Summary

- signoz package with goreleaser
- frontend deprecation
- alertmanager deprecation

---------

Signed-off-by: Prashant Shahi <prashant@signoz.io>

conf/cache-config.yml

@@ -0,0 +1,4 @@
+provider: "inmemory"
+inmemory:
+  ttl: 60m
+  cleanupInterval: 10m

conf/prometheus.yml

@@ -0,0 +1,25 @@
+# my global config
+global:
+  scrape_interval:     5s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
+  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
+  # scrape_timeout is set to the global default (10s).
+
+# Alertmanager configuration
+alerting:
+  alertmanagers:
+  - static_configs:
+    - targets:
+      - 127.0.0.1:9093
+
+# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
+rule_files:
+  # - "first_rules.yml"
+  # - "second_rules.yml"
+  - 'alerts.yml'
+
+# A scrape configuration containing exactly one endpoint to scrape:
+# Here it's Prometheus itself.
+scrape_configs: []
+
+remote_read:
+  - url: tcp://localhost:9000/signoz_metrics