Feat/rust actix postgres quickstart

[Atul-Chahar]

What has changed?

This PR introduces the Rust Quickstart Guide for using Keploy with Actix-web and PostgreSQL. It provides a step-by-step tutorial for both local and Docker-based setups, enabling Rust developers to easily integrate Keploy for API testing.

Key Changes:

• New Guide: Added docs/quickstart/rust-actix-postgres.md.
• Navigation:
  • Added "Rust" category to sidebars.json.
  • Added "Rust" options to QuickStartFilter.js and QuickStartList.js.
• Assets: Added 15 light-theme terminal screenshots to static/img/.

This PR Resolves #(issue)

Type of change

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as expected).
• Documentation update (if none of the other choices apply).

Docs Website Rust addition in filter:

screenrecording-2026-02-04_16-55-37.mp4

Quickstart check for Docker:

screenrecording-2026-02-02_22-40-49.mp4

How Has This Been Tested?

I ran npm run build locally to verify that the documentation builds without errors and the new pages are generated correctly.

• Check: npm run build passes successfully.
• Visual: Verified that the Rust category appears in the sidebar and the Quickstart filter works correctly.

Checklist:

• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.

Sample Code

The sample application code is available at: Atul-Chahar/samples-rust