feat: add graph mw changelog, improve changelogs structure

[snigdha920]

[linear]

CUS-671 Add graph mw changelog

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request introduces a new changelog section for Graph Middleware and improves the overall structure of the changelog.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Added a new changelog section for Graph Middleware.	Created a new markdown file to document the simplified subgraph deployment process. Added details about the previous and current subgraph deployment processes. Highlighted the key benefits of the simplified subgraph deployment process, including simplified architecture, cost efficiency, and enhanced flexibility.	releases/2025-01-02-simplified-subgraph-deployment.md
Improved the structure of the changelog by migrating existing changelog entries to a new blog format and updating links and image paths.	Added a new blog plugin to the Docusaurus configuration. Configured the blog plugin with the ID "releases", route base path "releases", and path "./releases". Enabled sorting of blog posts in descending order. Updated the navbar link for releases to point to the new releases section. Moved all changelog files to the releases directory. Updated image paths in the changelog files to reflect the new directory structure. Removed the date and image from the top of each changelog file, as this information is now handled by the blog plugin.	docusaurus.config.ts releases/2024-03-22-self-managed-platform-v7.md releases/2024-04-02-managed-platform-v7.md releases/2024-04-02-polygon-amoy.md releases/2024-04-22-embedded-o11y-infrastructure.md releases/2024-06-27-hashgraph-hedera.md releases/2024-07-10-installation-guide-for-google-cloud-platform.md releases/2024-07-23-smart-contract-set-portal.md releases/2024-07-30-audit-logs.md releases/2024-08-01-customize-genesis-bootnode-lists-and-key-material.md releases/2024-08-23-attestation-service.md releases/2024-08-29-support-qbft-for-besu.md releases/2024-09-25-customize-kubernetes-deployment-settings.md releases/2024-09-27-user-wallet-manager.md releases/2024-10-02-support-the-soneium-network.md releases/2024-10-04-integration-of-external-consortia.md releases/2024-10-11-run-anything-as-a-custom-deployment.md
Removed the old category file.	Deleted the _category_.json file as it's no longer needed with the new blog structure.	releases/_category_.json

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[sourcery-ai]

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

Here's what I looked at during the review

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

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[sourcery-ai]

We have skipped reviewing this pull request. It looks like we've already reviewed the commit dc481a7 in this pull request.