Refactor overview and add query layers page

Signed-off-by: Ana Hobden <operator@hoverbear.org>

content/docs/3.0/concepts/overview.md

@@ -12,26 +12,22 @@ menu:
 
 **TiKV** is a distributed transactional key-value database originally created by [PingCAP](https://pingcap.com/en) to complement [TiDB](https://github.com/pingcap/tidb).
 
+As an incubating project of the [Cloud Native Computing Foundation](https://www.cncf.io/), TiKV is intended to fill the role of a unifying distributed storage layer. TiKV excels at working with **data in the large** by supporting petabyte scale deployments spanning trillions of rows.
+
+It compliments other CNCF projects technologies like [etcd](https://etcd.io/) which is useful for low-volume metadata storage, and can be extended using [stateless query layers](../../reference/query-layers) which speak other protocols, like [TiDB](https://github.com/pingcap/tidb) speaking MySQL.
+
 {{< info >}}
 The **Ti** in TiKV stands for **titanium**. Titanium has the highest strength-to-density ratio of any metallic element and is named after the Titans of Greek mythology.
 {{< /info >}}
 
-## Features
+## Notable Features
 
-{{< features >}}
+{{< features featured >}}
 
-## Code
+You can browse a complete list on the [features](../features) page.
-
-TiKV is written in [Rust](https://www.rust-lang.org) and powered by the [Raft](https://raft.github.io) consensus algorithm.
-
-## Inspiration
-
-TiKV was originally inspired by [Google Spanner](https://ai.google/research/pubs/pub39966) and [HBase](https://hbase.apache.org).
 
 ## Architecture
 
-The basic architecture of TiKV is described in the diagram below:
-
 {{< figure
     src="/img/basic-architecture.png"
     caption="The architecture of TiKV"
@@ -40,3 +36,9 @@ The basic architecture of TiKV is described in the diagram below:
     number="1" >}}
 
 You can read more in the [Concepts and architecture](../architecture/) documentation.
+
+## Codebase, Inspiration, and Culture
+
+TiKV is implemented in the [Rust](https://rust-lang.org) programming language. It uses technologies like [Facebook's RocksDB](https://rocksdb.org/) and [Raft](https://raft.github.io/).
+
+The project was originally inspired by [Google Spanner](https://ai.google/research/pubs/pub39966) and [HBase](https://hbase.apache.org).

content/docs/3.0/reference/clients/introduction.md

@@ -4,6 +4,7 @@ description: Interact with TiKV using the raw key-value API or the transactional
 menu:
     docs:
         parent: Reference
+        weight: 2
 ---
 
 TiKV has clients for a number of languages:

content/docs/3.0/reference/query-layers.md

@@ -0,0 +1,16 @@
+---
+title: Query Layers
+description: Extend TiKV using stateless query layers
+menu:
+    docs:
+        parent: Reference
+        weight: 3
+---
+
+There are several projects which harness TiKV to power their storage:
+
+* [TiDB](https://github.com/pingcap/tidb) (MySQL)
+* [TiPrometheus](https://github.com/bragfoo/TiPrometheus) (Prometheus)
+* [Titan](https://github.com/distributedio/titan) (Redis)
+* [Tidis](https://github.com/yongman/tidis) (Redis)
+* [Titea](https://github.com/gengmei-tech/titea) (Redis)

data/features.yaml

@@ -1,12 +1,33 @@
 - name: Geo-replication
   description: TiKV uses the [Raft](https://raft.github.io/) consensus algorithm and the [Placement Driver](/docs/3.0/concepts/architecture#placement-driver) to support geo-replication.
   icon: fa-globe
+  featured: true
 - name: Horizontal scalability
   description: With the [Placement Driver](/docs/3.0/concepts/architecture#placement-driver) and carefully designed Raft groups, TiKV excels in horizontal scalability and can easily scale to 100+ terabytes of data.
   icon: fa-ruler-horizontal
+  featured: true
 - name: Consistent distributed transactions
   description: Similar to Google's [Spanner](https://ai.google/research/pubs/pub39966), TiKV supports externally consistent distributed transactions.
   icon: fa-align-center
+  featured: true
 - name: Coprocessor support
   description: Similar to [Hbase](https://hbase.apache.org), TiKV implements a coprocessor framework to support distributed computing.
   icon: fa-microchip
+  featured: true
+- name: Automatic sharding
+  description: TiKV shards your data into regions without manual intervention, reducing maintenance burden.
+  icon: fa-boxes
+- name: Region balance
+  description: TiKV supports rebalancing regions due to faults, workload, or topology needs.
+  icon: fa-balance-scale
+- name: Dynamic membership
+  description: Grow or shrink TiKV clusters dynamically, without the need for downtime.
+  icon: fa-cogs
+- name: Rolling online updates
+  description: Using supported deployment methods, safely upgrade TiKV clusters without worry.
+- name: Extensive Metric Suite
+  description: Easily integrate TiKV into your infrastructure monitoring with extensive Prometheus reporting.
+  icon: fa-eye
+- name: Flexible APIs
+  description: Use transactional or raw gRPC APIs through clients in your favorite language, or use gRPC directly.
+  icon: fa-plug

layouts/index.html

@@ -48,7 +48,7 @@
 <section class="section has-background-primary">
   <div class="container">
     <div class="columns">
-      {{ range $features }}
+      {{ range where $features "featured" true }}
       <div class="column">
         <div class="card">
           <header class="card-header">

layouts/shortcodes/features.html

@@ -1,4 +1,7 @@
 {{ $features := site.Data.features }}
+{{ if eq (.Get 0) "featured"}}
+  {{ $features = where $features "featured" true  }}
+{{ end }}
 <table>
   <thead>
     <tr>