feat: add push, pull, and fetch commands

[angeloashmore]

Resolves:

Description

Adds three new commands for a local-first modeling workflow:

• prismic push — push local types and slices to the remote.
• prismic pull — pull remote types and slices to local files.
• prismic fetch — refresh the local snapshot of the remote (no file writes).

A snapshot of the remote is persisted under the user's config dir so push and pull can detect drift and require --force for destructive changes.

sync is simplified to only support --watch for compatibility. In a future PR, sync will be deprecated and/or removed. The Type Builder instructions and docs will be updated for push/pull before that change.

Pairs with #163 (modeling commands operate on local files only). Either can land first.

Checklist

• A comprehensive Linear ticket, providing sufficient context and details to facilitate the review of the PR, is linked to the PR.
• If my changes require tests, I added them.
• If my changes affect backward compatibility, it has been discussed.
• If my changes require an update to the CONTRIBUTING.md guide, I updated it.

Preview

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Note

Medium Risk
Adds new commands that can create/update/delete local or remote models and introduces snapshot-based drift detection; incorrect diffing or snapshot handling could lead to unintended overwrites or deletions despite --force safeguards.

Overview
Introduces a local-first modeling workflow with three new CLI commands: prismic pull (remote → local), prismic push (local → remote), and prismic fetch (refresh remote snapshot only), all using a persisted snapshot to detect drift and require --force before overwriting changes.

Moves one-time sync logic out of the adapter by deleting Adapter.syncModels/syncSlices/syncCustomTypes, adds a shared diffArrays helper for insert/update/delete planning, and updates init to perform an initial pull + type generation and then write the snapshot. sync is simplified to watch-only polling that applies remote diffs to local files, writes snapshots on change, and has adjusted error handling/limits.

Adds snapshot persistence under the user config directory keyed by project+repo, exports CONFIG_DIR for reuse, wires new commands into the CLI router, and expands E2E tests to cover fetch/pull/push behavior and drift/--force safeguards.

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