chore: consolidate actions workflow

[j-mes]

This pull request refactors and consolidates the GitHub Actions workflows for building and deploying the project. The separate build and deployment workflow (build-and-deploy.yml) has been removed, and its logic has been merged into the main build workflow (build.yml). The new workflow also introduces improved deployment practices and updates several actions to their latest versions.

Workflow consolidation and deployment improvements:

• Removed the .github/workflows/build-and-deploy.yml file, consolidating build and deployment steps into a single workflow.
• Updated .github/workflows/build.yml to handle both pull requests and pushes to main, including deployment to GitHub Pages only on pushes to main.
• Added least-privilege permissions and concurrency controls to prevent overlapping deployments and improve security.
• Switched to newer versions of GitHub Actions (actions/checkout@v4, actions/setup-node@v4) and replaced the deployment step with actions/deploy-pages@v4, aligning with recommended practices for GitHub Pages.
• Improved artifact upload and deployment logic by using actions/upload-pages-artifact@v2 and conditionally deploying only when appropriate.

[Copilot]

Pull Request Overview

This pull request consolidates the GitHub Actions workflows by merging the separate build and deployment workflow into a single workflow file that handles both building and deploying the project. The changes introduce improved security practices, update actions to newer versions, and implement deployment to GitHub Pages using the recommended approach.

• Removed the separate build-and-deploy.yml workflow file
• Enhanced the main build.yml workflow to handle both pull requests and pushes to main branch
• Updated to newer action versions and implemented least-privilege permissions with concurrency controls

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
.github/workflows/build.yml	Consolidated workflow that now handles both building and deploying, with updated actions and improved security
.github/workflows/build-and-deploy.yml	Removed separate deployment workflow file

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[Copilot]

Remove the commented environment configuration. If this configuration is needed, it should be uncommented and properly configured. Otherwise, it adds unnecessary clutter to the workflow file.

Suggested change

	# environment:
	# name: github-pages
	# url: ${{ steps.deployment.outputs.page_url }}

[Copilot]

The deploy step should include a needs dependency on the upload step to ensure proper sequencing. Consider restructuring this as a separate job that depends on the build job to follow GitHub Pages deployment best practices.

Suggested change

	- name: Deploy to GitHub Pages
	if: github.event_name == 'push' && github.ref == 'refs/heads/main'
	# Removed from build job; will be added as a separate deploy job below.
	deploy:
	if: github.event_name == 'push' && github.ref == 'refs/heads/main'
	needs: build
	runs-on: ubuntu-latest
	environment:
	name: github-pages
	permissions:
	contents: read
	pages: write
	id-token: write
	steps:
	- name: Deploy to GitHub Pages