feat: add v0.13.0

[jcstein]

Overview

Notes from updating:

--> Generating OpenRPC spec
failed to retrieve example value for type: blob.GasPrice on parent 'blob.GasPrice')
{
    "openrpc": "1.2.6",
    "info": {
        "title": "Celestia Node API",
        "description": "The Celestia Node API is the collection of RPC methods that can be used to interact with the services provided by Celestia Data Availability Nodes.",
        "version": "v0.11.0"
    },

1. no example value for blob.GasPrice
2. API version is still v0.11.0, which is the same as last few releases, i just ran make openrpc-gen on v0.11.0 and the API version is the same there. this is related to this ticket that is related to api version [Feature Request]: match upcoming node version with API celestia-node#2549

--> Generating OpenRPC spec
{
    "openrpc": "1.2.6",
    "info": {
        "title": "Celestia Node API",
        "description": "The Celestia Node API is the collection of RPC methods that can be used to interact with the services provided by Celestia Data Availability Nodes.",
        "version": "v0.11.0"
    },

Storing openrpc.json in main would allow for this to have validation before being published, and a history to exist for maintainers of node-rpc-docs. celestiaorg/celestia-node#2611

Checklist

• New and updated code has appropriate documentation
• New and updated code has new and/or updated testing
• Required CI checks are passing
• Visual proof for any user facing features like CLI or documentation updates
• Linked issues closed with keywords

[jcstein]

resolved in a hotfix to this Spec. PR has been made to push this fix to celestia-node