feat: graph middleware not dependant on SCS and IPFS anymore

[snigdha920]

Summary by Sourcery

New Features:

• Connect the Graph Middleware directly to a blockchain node.

[linear]

ENG-1989 Update graph middleware docs

It doesn't need a smart contract set or storage anymore, update docs accordingly

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request decouples the Graph Middleware from Smart Contract Sets and IPFS, allowing it to connect directly to blockchain nodes. This simplifies the process of adding a middleware by removing the need to select a Smart Contract Set and storage provider.

Sequence diagram: Simplified middleware setup process

sequenceDiagram
    actor User
    participant Platform
    participant Middleware
    participant Blockchain

    Note over User,Blockchain: New simplified process
    User->>Platform: Add middleware
    User->>Platform: Select blockchain node
    User->>Platform: Configure deployment plan
    Platform->>Middleware: Deploy middleware
    Middleware->>Blockchain: Connect directly
    Platform-->>User: Middleware ready

Loading

File-Level Changes

Change	Details	Files
Updated the middleware documentation to reflect the changes.	Removed references to Smart Contract Sets and IPFS as prerequisites for adding a middleware. Added instructions for connecting to a blockchain node. Removed the steps for selecting a Smart Contract Set and storage provider when adding a middleware. Clarified the process of defining and deploying a subgraph. Updated the list of prerequisites for using the middleware. Updated the code examples to use blockchain nodes instead of Smart Contract Sets and IPFS.	docs/using-platform/11_middleware.md

---

Tips and commands

Interacting with Sourcery

• Trigger a new review: Comment @sourcery-ai review on the pull request.
• Continue discussions: Reply directly to Sourcery's review comments.
• Generate a GitHub issue from a review comment: Ask Sourcery to create an
  issue from a review comment by replying to it.
• Generate a pull request title: Write @sourcery-ai anywhere in the pull
  request title to generate a title at any time.
• Generate a pull request summary: Write @sourcery-ai summary anywhere in
  the pull request body to generate a PR summary at any time. You can also use
  this command to specify where the summary should be inserted.

Customizing Your Experience

Access your dashboard to:

• Enable or disable review features such as the Sourcery-generated pull request
  summary, the reviewer's guide, and others.
• Change the review language.
• Add, remove or edit custom review instructions.
• Adjust other review settings.

Getting Help

• Contact our support team for questions or feedback.
• Visit our documentation for detailed guides and information.
• Keep in touch with the Sourcery team by following us on X/Twitter, LinkedIn or GitHub.

[sourcery-ai]

Hey @snigdha920 - I've reviewed your changes - here's some feedback:

Overall Comments:

• The warning section no longer mentions the private key requirement - please clarify if this is still needed and add it back to the warning section if it is

Here's what I looked at during the review

• 🟡 General issues: 2 issues found
• 🟢 Security: all looks good
• 🟢 Review instructions: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

---

_{Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.}

[sourcery-ai]

Hey @snigdha920 - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟡 General issues: 1 issue found
• 🟢 Security: all looks good
• 🟢 Review instructions: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

---

_{Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.}

[sourcery-ai]

issue: Incorrect reference to "smart contract set"

The text refers to adding the "smart contract set", but it should be adding the middleware. Please correct this.