Use bsk from PyPi for builds

[ReeceHumphreys]

Description

This PR switches bsk-rl from using basilisk built from source to basilisk wheels that are published.

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)

How should this pull request be reviewed?

• By commit
• All changes at once

How Has This Been Tested?

The GitHub Actions should succeed if everything is good.

Future Work

N/A

Checklist

• I have performed a self-review of my code
• I have commented my code in hard-to-understand areas
• I have made corresponding changes to the documentation and release notes
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works

Closes #308

[Copilot]

Pull Request Overview

This PR transitions BSK-RL from building Basilisk from source to using pre-built Basilisk wheels distributed on PyPI. The change simplifies the build process by adding bsk==2.8.9 as a direct dependency and updating CI/CD workflows to use a streamlined build action.

• Added bsk==2.8.9 as a dependency in pyproject.toml
• Replaced custom Basilisk wheel retrieval with standard PyPI installation
• Simplified CI/CD workflows by replacing complex build action with straightforward dependency installation

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pyproject.toml	Adds bsk dependency to enable PyPI-based installation
docs/source/release_notes.rst	Documents the dependency addition and CI/CD workflow updates
.github/workflows/pull_request_closed.yml	Removes trailing whitespace
.github/workflows/documentation.yml	Updates to use new build action and removes whitespace
.github/workflows/commit_checks.yml	Standardizes quotes and updates to use new build action
.github/actions/install-bsk-rl/action.yml	Removes complex action that downloaded Basilisk artifacts
.github/actions/build/action.yml	Adds simplified build action using standard pip installation

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[Mark2000]

Thanks, looks good!