Add section for Indexer SDK (#756)

* indexer sdk

* add initial setup page

* add steps page

* fix lint

* remove documentation.mdx

* feedback

* fix links

Author: rtso

apps/nextra/next.config.mjs

@@ -393,13 +393,28 @@ export default withBundleAnalyzer(
         permanent: true,
       },
       {
-        source: "/indexer/custom-processors/e2e-tutorial",
-        destination: "/en/build/indexer/custom-processors/e2e-tutorial",
+        source: "/indexer/indexer-sdk/quickstart",
+        destination: "/en/build/indexer/indexer-sdk/quickstart",
         permanent: true,
       },
       {
-        source: "/indexer/custom-processors/parsing-txns",
-        destination: "/en/build/indexer/custom-processors/parsing-txns",
+        source: "/indexer/indexer-sdk/documentation",
+        destination: "/en/build/indexer/indexer-sdk/documentation",
+        permanent: true,
+      },
+      {
+        source: "/indexer/indexer-sdk/documentation/setup",
+        destination: "/en/build/indexer/indexer-sdk/documentation/setup",
+        permanent: true,
+      },
+      {
+        source: "/indexer/indexer-sdk/documentation/steps",
+        destination: "/en/build/indexer/indexer-sdk/documentation/steps",
+        permanent: true,
+      },
+      {
+        source: "/indexer/indexer-sdk/documentation/parsing-txns",
+        destination: "/en/build/indexer/indexer-sdk/documentation/parsing-txns",
         permanent: true,
       },
       {

apps/nextra/pages/en/build/cli/running-a-local-network.mdx

@@ -118,7 +118,7 @@ As you can see from the example output in step 4, once the local network is runn
 
 - [Node API](../../network/nodes/aptos-api-spec.mdx): This is a REST API that runs directly on the node. It enables core write functionality such as transaction submission and a limited set of read functionality, such as reading account resources or Move module information.
 - [Indexer API](../indexer/aptos-hosted.mdx): This is a [GraphQL](https://graphql.org/) API that provides rich read access to indexed blockchain data. If you click on the URL for the Indexer API above, by default [http://127.0.0.1:8090](http://127.0.0.1:8090/), it will open the Hasura Console, a web UI that will help you query the Indexer GraphQL API.
-- [Transaction Stream Service](../indexer/txn-stream.mdx): This is a gRPC stream of transactions used by the Indexer API. This is only relevant to you if you are developing a [custom processor](../indexer/custom-processors.mdx).
+- [Transaction Stream Service](../indexer/txn-stream.mdx): This is a gRPC stream of transactions used by the Indexer API and SDK. This is only relevant to you if you are developing a [Indexer SDK](../indexer/indexer-sdk.mdx) custom processor.
 - [Postgres](https://www.postgresql.org/): This is the database that the Indexer processors write to. The Indexer API reads from this database.
 - [Faucet](../apis/faucet-api.mdx): You can use this to fund accounts on your local network.
 
@@ -166,7 +166,7 @@ const client = new Aptos(config);
 Sometimes while developing it is helpful to reset the local network back to its initial state, for example:
 
 - You made backwards incompatible changes to a Move module, and you'd like to redeploy it without renaming it or using a new account.
-- You are building a [custom indexer processor](../indexer/custom-processors.mdx) and would like to index using a fresh network.
+- You are building an [Indexer SDK](../indexer/indexer-sdk.mdx) custom processor and would like to index using a fresh network.
 - You want to clear all on chain state, e.g. accounts, objects, etc.
 
 To start with a brand new local network, use the `--force-restart` flag:

apps/nextra/pages/en/build/indexer.mdx

@@ -107,9 +107,9 @@ If the hosted Indexer API is not enough, you can customize and host your own ver
     <Card.Title>Architecture</Card.Title>
     <Card.Description>Detailed layout of the Indexer's architecture.</Card.Description>
   </Card>
-  <Card href="indexer/custom-processors">
-    <Card.Title>Custom Processors</Card.Title>
-    <Card.Description>Customize way data is processed and shared in the Indexer</Card.Description>
+  <Card href="indexer/indexer-sdk">
+    <Card.Title>Indexer SDK</Card.Title>
+    <Card.Description>Create a custom processor with the Indexer SDK</Card.Description>
   </Card>
   <Card href="indexer/txn-stream">
     <Card.Title>Transaction Streaming Service</Card.Title>

apps/nextra/pages/en/build/indexer/_meta.tsx

@@ -16,8 +16,8 @@ export default {
     type: "separator",
     title: "Indexer Customizations (Advanced)",
   },
-  "custom-processors": {
-    title: "Custom Processors",
+  "indexer-sdk": {
+    title: "Indexer SDK",
   },
   "txn-stream": {
     title: "Transaction Stream Service",

apps/nextra/pages/en/build/indexer/architecture.mdx

@@ -29,9 +29,9 @@ Here is how the Indexer creates that API at a high-level:
   />
 </center>
 
-The Indexer uses the [Transaction Stream Service](./txn-stream.mdx) and [Custom Processors](./custom-processors.mdx) to update a database with rich tables. Then it exposes an API for Aptos apps to access the consolidated data.
+The Indexer uses the [Transaction Stream Service](./txn-stream.mdx) and custom processors written with the [Indexer SDK](./indexer-sdk.mdx) to update a database with rich tables. Then it exposes an API for Aptos apps to access the consolidated data.
 
-For situations where you need to go beyond the Aptos hosted Indexer API data, you will want to create a [custom processor](./custom-processors.mdx).
+For situations where you need to go beyond the Aptos hosted Indexer API data, you will want to create a custom processor with the Indexer SDK (./indexer-sdk.mdx).
 
 Writing a custom processor can help you:
 1. Get access to different types of data.