Add a content page on how to achieve CI with Ballerina with different technologies

[LakshanWeerasinghe]

Description

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There is a section under the Cloud Native page that covers configuring GitHub Actions for Ballerina. However, the Ballerina website lacks a dedicated page on configuring Continuous Integration (CI) pipelines for building and testing Ballerina projects. For example, the Rust documentation includes a dedicated page that provides guidance on CI setup. This page should include sample CI configuration files for various CI technologies, such as GitHub Actions, CircleCI, Jenkins, and more, to guide users through setting up and automating their Ballerina workflows.

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[LakshanWeerasinghe]

I think in the future we can have a dedicated section that groups together content related to CI/CD and code scanning (static code analysis).