Add title and description metadata to documentation pages

docs/content/observability/tracing/datadog.md

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+---
+title: "Traefik Datadog Tracing Documentation"
+description: "Traefik Proxy supports Datadog for tracing. Read the technical documentation to enable Datadog for observability."
+---
+
 # Datadog
 
 To enable the Datadog tracer:

docs/content/observability/tracing/elastic.md

@@ -1,3 +1,8 @@
+---
+title: "Traefik Elastic Documentation"
+description: "Traefik supports several tracing backends, including Elastic. Learn how to implement it for observability in Traefik Proxy. Read the technical documentation."
+---
+
 # Elastic
 
 To enable the Elastic tracer:

docs/content/observability/tracing/haystack.md

@@ -1,3 +1,8 @@
+---
+title: "Traefik Haystack Documentation"
+description: "Traefik supports several tracing backends, including Haystack. Learn how to implement it for observability in Traefik Proxy. Read the technical documentation."
+---
+
 # Haystack
 
 To enable the Haystack tracer:

docs/content/observability/tracing/instana.md

@@ -1,3 +1,8 @@
+---
+title: "Traefik Instana Documentation"
+description: "Traefik supports several tracing backends, including Instana. Learn how to implement it for observability in Traefik Proxy. Read the technical documentation."
+---
+
 # Instana
 
 To enable the Instana tracer:

docs/content/observability/tracing/jaeger.md

@@ -1,3 +1,8 @@
+---
+title: "Traefik Jaeger Documentation"
+description: "Traefik supports several tracing backends, including Jaeger. Learn how to implement it for observability in Traefik Proxy. Read the technical documentation."
+---
+
 # Jaeger
 
 To enable the Jaeger tracer:

docs/content/observability/tracing/overview.md

@@ -1,3 +1,8 @@
+---
+title: "Traefik Tracing Overview"
+description: "The Traefik Proxy tracing system allows developers to visualize call flows in their infrastructure. Read the full documentation."
+---
+
 # Tracing
 
 Visualize the Requests Flow

docs/content/observability/tracing/zipkin.md

@@ -1,3 +1,8 @@
+---
+title: "Traefik Zipkin Documentation"
+description: "Traefik supports several tracing backends, including Zipkin. Learn how to implement it for observability in Traefik Proxy. Read the technical documentation."
+---
+
 # Zipkin
 
 To enable the Zipkin tracer: