build: add wireit for better build management

[GeekyEggo]

• Adds type-checking to build process.
• Improves build pipeline to better accomodate build dependencies.
• Prepares for migration to mono-repo.

[Copilot]

Pull request overview

This PR introduces Wireit-based build orchestration to improve build dependency management, adds TypeScript type-checking to the build pipeline, and updates related tooling/configuration in preparation for a future monorepo migration.

Changes:

• Replace ad-hoc build/watch scripts with Wireit tasks and add a typecheck step.
• Update build/watch behavior (incl. watch-mode detection) and TypeScript config.
• Refresh lint/format tooling dependencies and update docs/comments accordingly.

Reviewed changes

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

Show a summary per file

File	Description
vs.code-workspace	Removes the workspace file from the repo.
tsconfig.json	Adds Node types and reformats config.
src/validation/plugin/plugin.ts	JSDoc wording/link adjustment.
src/config.ts	JSDoc wording/link adjustment.
src/common/file-copier.ts	JSDoc reflow/clarification.
src/common/command.ts	JSDoc reflow/clarification.
src/commands/stop.ts	JSDoc wording change.
src/commands/restart.ts	JSDoc wording change.
rolldown.config.ts	Changes watch-mode detection to align with new workflow.
package.json	Adds Wireit tasks/scripts and a typecheck target; updates dev tooling deps.
package-lock.json	Locks new toolchain dependency graph (incl. Wireit and updated lint/format deps).
.gitignore	Ignores Wireit cache directory.

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