feat!: support simple-release v3 action releases

[dangreen]

BREAKING CHANGE: the action now runs on Node.js 24 and uses @simple-release v3 release options.

[Copilot]

Pull request overview

This PR upgrades the action to work with @simple-release/* v3, adopts the v3 input/options model, and bumps the action runtime to Node.js 24 (including adding a new snapshot workflow mode).

Changes:

• Switch from a single branch input to v3-style getInputOptions() and merge checkout/bump/maintenanceBranch/publish options; add snapshot workflow execution.
• Migrate lockfile tooling from npm to pnpm (add pnpm-lock.yaml / pnpm-workspace.yaml, remove package-lock.json).
• Update action metadata and docs to expose new bump/publish/maintenance inputs and Node 24 runtime.

Reviewed changes

Copilot reviewed 8 out of 11 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/index.js	Integrates v3 input options merging and adds snapshot workflow path.
README.md	Documents the new snapshot workflow and additional release/bump inputs.
pnpm-workspace.yaml	Adds pnpm workspace settings (peer install + minimum release age exclusions).
pnpm-lock.yaml	Introduces pnpm lockfile for dependency resolution.
package.json	Updates dependencies to @simple-release/* v3 and adjusts packaging metadata.
package-lock.json	Removes npm lockfile in favor of pnpm.
action.yml	Adds new inputs and updates runtime to node24.
.tool-versions	Switches toolchain pins toward pnpm and updates Node pin.
.simple-release.json	Adds simple-release config for this repo/action.
.gitignore	Expands ignores to cover node_modules and additional local tooling artifacts.
.github/workflows/release.yml	Adds/updates the repo’s release workflow using pnpm + Node 24.

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

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[Copilot]

Pull request overview

Copilot reviewed 9 out of 12 changed files in this pull request and generated 3 comments.

Files not reviewed (1)

• pnpm-lock.yaml: Generated file