fix(workflows): consolidate VS extension release into release.yml

[rajbos]

Problem

Three separate issues were found by analyzing recent failed/skipped workflow runs:

1. release.yml silently skipped VS extension on normal workflow_dispatch (run #24292416722)

The build-visualstudio job had this condition:

if: github.event_name == 'push' || inputs.vs_only == true

On a standard workflow_dispatch with defaults, event_name is 'workflow_dispatch' (not 'push') and vs_only defaults to false → always skipped.

The only reason the VS-only run #24292659528 worked was because vs_only=true was explicitly set.

2. visualstudio-build.yml failed with missing secret (run #24292599081)

The standalone workflow used secrets.VS_MARKETPLACE_PAT which doesn't exist. release.yml already had the right answer in a comment: secrets.VSCE_PAT # same one works for VS Marketplace.

3. Two separate release paths for the VS extension (confusing)

visualstudio-build.yml had its own vs/v* tag trigger + workflow_dispatch with marketplace publish, duplicating the build-visualstudio job in release.yml.

Changes

release.yml

• Fix: Changed build-visualstudio job condition from github.event_name == 'push' || inputs.vs_only == true → inputs.vscode_only != true (runs for all triggers unless explicitly excluded)
• Add: vscode_only boolean input (complement to existing vs_only) — allows releasing only the VS Code extension without triggering the Windows VS build

visualstudio-build.yml → CI-only

• Remove vs/v* tag trigger (releases go through release.yml)
• Remove workflow_dispatch with publish_marketplace input (releases go through release.yml)
• Remove marketplace publish step (eliminates the broken VS_MARKETPLACE_PAT secret reference)
• Remove github-release job (releases go through release.yml)
• Simplify job outputs and permissions (no longer needs contents: write)

Result

Scenario	Before	After
workflow_dispatch normal release	VS extension skipped ❌	VS extension built ✅
workflow_dispatch vs_only=true	Works ✅	Works ✅
workflow_dispatch vscode_only=true	No such option	VS extension skipped ✅
vscode/v* tag push	VS extension skipped ❌	VS extension built ✅
VS-only standalone workflow_dispatch	Fails (wrong secret) ❌	Use release.yml with vs_only=true ✅