GHA: wire up build of swift-docc

[compnerd]

This is now a required component of the installer image and built with CMake. This completes the toolchain coverage.

[Copilot]

Pull Request Overview

This PR integrates swift-docc and its dependencies into the GitHub Actions workflow for building the Swift toolchain. The changes add the required build steps for swift-docc, swift-docc-symbolkit, and swift-docc-render-artifact as part of the toolchain installer image.

• Adds three new required input parameters for swift-docc component revisions
• Integrates checkout and build steps for swift-docc components in the toolchain workflow
• Passes swift-docc-render-artifact path to the MSBuild installer configuration

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
.github/workflows/swift-toolchain.yml	Adds input parameters, checkout steps, CMake configuration/build steps for swift-docc components, and installer configuration parameter
.github/workflows/build-toolchain.yml	Passes through the new swift-docc revision parameters from context to workflow calls

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Variable reference is missing 's' - should be inputs.swift_version instead of input.swift_version.

Suggested change

	install-dir: ${{ github.workspace }}/BuildRoot/Library/Developer/Toolchains/${{ input.swift_version }}+Asserts/usr
	install-dir: ${{ github.workspace }}/BuildRoot/Library/Developer/Toolchains/${{ inputs.swift_version }}+Asserts/usr

[Copilot]

Variable reference is missing 's' - should be inputs.swift_version instead of input.swift_version.

Suggested change

	install-dir: ${{ github.workspace }}/BuildRoot/Library/Developer/Toolchains/${{ input.swift_version }}+Asserts/usr
	install-dir: ${{ github.workspace }}/BuildRoot/Library/Developer/Toolchains/${{ inputs.swift_version }}+Asserts/usr

[Copilot]

MSBuild parameter assignment has spaces around the equals sign which will cause a syntax error. Should be -p:SWIFT_DOCC_RENDER_ARTIFACT_ROOT=\"${{ github.workspace }}\SourceCache\swift-docc-render-artifact\" without spaces around =.

Suggested change

	-p:SWIFT_DOCC_RENDER_ARTIFACT_ROOT = "${{ github.workspace }}\SourceCache\swift-docc-render-artifact" `
	-p:SWIFT_DOCC_RENDER_ARTIFACT_ROOT="${{ github.workspace }}\SourceCache\swift-docc-render-artifact" `

[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.