Add theme dev reconciliation strategy flag

[gonzaloriestra]

WHY are these changes introduced?

The interactivity audit found that theme dev with --theme-editor-sync could still prompt when JSON files needed reconciliation.

WHAT is this pull request doing?

• Adds --reconciliation-strategy with keep-local, keep-remote, and abort options.
• Threads the strategy through theme editor sync reconciliation and refreshes generated command docs.

How to test your changes?

• pnpm vitest run packages/theme/src/cli/utilities/theme-environment/theme-reconciliation.test.ts packages/theme/src/cli/utilities/theme-environment/theme-environment.test.ts
• pnpm refresh-manifests

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes
• I've considered analytics changes to measure impact
• The change is user-facing, so I've added a changelog entry with pnpm changeset add

[gonzaloriestra]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• Add theme dev reconciliation strategy flag #7634 👈 (View in Graphite)
• Allow theme profile with Theme Access tokens #7633
• Add non-interactive app dev prompt bypasses #7632
• Allow app config validate to target config by client ID #7631
• Allow app config link to target config by client ID #7630
• main

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