feat(docs): add availability notice for Web2Json attestation type on Flare Testnet (#747)

Author: fassko

docs/fdc/guides/_available_testnet.mdx

@@ -0,0 +1,5 @@
+:::info
+
+The `Web2Json` attestation type is currently only available on the Flare Testnet Coston2 .
+
+:::

docs/fdc/guides/foundry/web-2-json-for-custom-api.mdx

@@ -7,11 +7,15 @@ keywords: [ethereum, flare-data-connector, evm, flare-network]
 sidebar_position: 12
 ---
 
+import AvailableTestnet from "../_available_testnet.mdx";
+
 The [Web2Json guide](/fdc/guides/foundry/web-2-json) demonstrates how the Flare Data Connector can be used to fetch Web2 and store it on the chain.
 The code for this and other examples is available within the [Flare Hardhat starter](https://github.com/flare-foundation/flare-foundry-starter) repository.
 In this guide, we will see how the `Web2Json` example script within the Flare Hardhat starter can be modified to work with custom data and custom contracts.
 That way, the example code can serve as the base building block for a custom project.
 
+<AvailableTestnet />
+
 ## Necessary modifications
 
 In order to run on custom data, the example code needs to be modified in four places only.

docs/fdc/guides/foundry/web-2-json.mdx

@@ -7,9 +7,13 @@ keywords: [ethereum, flare-data-connector, evm, flare-network]
 sidebar_position: 8
 ---
 
+import AvailableTestnet from "../_available_testnet.mdx";
+
 The `Web2Json` attestation type enables data collection from an arbitrary Web2 source.
 You can learn more about it in the official [specification repo](/fdc/attestation-types/web-2-json).
 
+<AvailableTestnet />
+
 We will now demonstrate how the FDC protocol can be used to collect the data of a given [Star Wars API](https://swapi.dev/) request.
 It will be a `GET` request to the URL `https://swapi.info/api/peaople/3`.
 The same procedure works for all public APIs.

docs/fdc/guides/hardhat/web-2-json-for-custom-api.mdx

@@ -7,11 +7,15 @@ keywords: [ethereum, flare-data-connector, evm, flare-network]
 sidebar_position: 12
 ---
 
+import AvailableTestnet from "../_available_testnet.mdx";
+
 The [Web2Json guide](/fdc/guides/hardhat/web-2-json) demonstrates how the Flare Data Connector can be used to fetch Web2 and store it on the chain.
 The code for this and other examples is available within the [Flare Hardhat starter](https://github.com/flare-foundation/flare-hardhat-starter) repository.
 In this guide, we will see how the `Web2Json` example script within the Flare Hardhat starter can be modified to work with custom data and custom contracts.
 That way, the example code can serve as the base building block for a custom project.
 
+<AvailableTestnet />
+
 ## Necessary modifications
 
 In order to run on custom data, the example code needs to be modified in four places only.

docs/fdc/guides/hardhat/web-2-json.mdx

@@ -8,9 +8,13 @@ sidebar_position: 8
 unlisted: false
 ---
 
+import AvailableTestnet from "../_available_testnet.mdx";
+
 The `Web2Json` attestation type enables data collection from an arbitrary Web2 source.
 You can learn more about it in the official [specification](/fdc/attestation-types/web-2-json).
 
+<AvailableTestnet />
+
 We will now demonstrate how the FDC protocol can be used to collect the data of a given [Star Wars API](https://swapi.dev/) request.
 The request we will be making is `https://swapi.info/api/people/3`.
 The same procedure works for all public APIs.