feat(docs): redpanda non-k8s dashboard

redpanda/README.md

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+# Redpanda Non-K8s Dashboard - OTLP
+
+## Data Ingestion - Redpanda (Non-k8s: Docker, Cloud, etc.)
+
+### Integrate Redpanda with OpenTelemetry Collector
+
+Follow the instructions on the official Redpanda website's [page](https://docs.redpanda.com/current/manage/monitoring/) about integrating OpenTelemetry with Redpanda, and the different metrics that are exposed by Redpanda.
+
+## Variables
+
+- `{{deployment_environment}}`: Deployment environment
+
+## Dashboard panels
+
+### Sections
+
+- Overall
+  - Brokers - `redpanda_cluster_brokers`
+  - Topics - `redpanda_cluster_topics`
+  - Partitions - `redpanda_cluster_partitions`
+  - Overall CPU Utilization - `redpanda_cpu_busy_seconds_total`
+  - Overall Disk Utilization - `redpanda_storage_disk_free_bytes`
+  - Overall Memory Utilization - `redpanda_memory_allocated_memory`
+  - Total Write IOPS - `redpanda_io_queue_total_write_ops`
+  - Total Produce Rate - `redpanda_kafka_request_bytes_total`
+  - Total Consume Rate - `redpanda_kafka_request_bytes_total`
+  - Screenshot of Overall Section - ![Overall Section Screenshot](assets/redpanda_nonk8s_overall.png)
+- Resource State
+  - CPU Utilization - `redpanda_cpu_busy_seconds_total`
+  - Disk Utilization - `redpanda_storage_disk_free_bytes`
+  - Read IOPS - `redpanda_io_queue_total_read_ops`
+  - Write IOPS - `redpanda_io_queue_total_write_ops`
+  - Active Connection - `redpanda_rpc_active_connections`
+  - Screenshot of Resource State Section - ![Resource State Section Screenshot](assets/redpanda_nonk8s_resource_state.png)
+- Operation State
+  - Rate of Leadership Change - `redpanda_raft_leadership_changes`
+  - Scheduler Runtime by Group - `redpanda_scheduler_runtime_seconds_total`
+  - Controller Max RPS by Command - `redpanda_cluster_controller_log_limit_requests_available_rps`
+  - Controller Dropped Requests - `redpanda_cluster_controller_log_limit_requests_dropped`
+  - Under Replicated Replicas - `redpanda_kafka_under_replicated_replicas`
+  - Unavailable Partitions - `redpanda_cluster_unavailable_partitions`
+  - Screenshot of Operation State Section - ![Operation State Section Screenshot](assets/redpanda_nonk8s_operation_state.png)
+- Produce/Consume State
+  - Produce Rate by Topic - `redpanda_kafka_request_bytes_total`
+  - Consume Rate by Topic - `redpanda_kafka_request_bytes_total`
+  - Total Produce Rate - `redpanda_kafka_request_bytes_total`
+  - Total Consume Rate - `redpanda_kafka_request_bytes_total`
+  - Total Produce Latency - `redpanda_kafka_request_latency_seconds_bucket`
+  - Total Consume Latency - `redpanda_kafka_request_latency_seconds_bucket`
+  - Consumer Lag by Topic and Partition - `redpanda_kafka_max_offset`
+  - Screenshot of Produce / Consume State Section - ![Produce/Consume State Section Screenshot](assets/redpanda_nonk8s_produce_consume_state_1.png)
+  ![Produce/Consume State Section Screenshot](assets/redpanda_nonk8s_produce_consume_state_2.png)