add SyncClock component

[gonpombo8]

Tween Synchronization

• Added a new startSyncedTimestamp field to the PBTween interface
• Implemented a new tween synchronization system that ensures tweens are properly synchronized across the network
• Created createTweenSyncSystem to manage tween synchronization using the global SyncedClock
• Fixed backwards tween handling to properly reset sync timestamps

Network Entity Updates

• Deprecated NetworkEntity component (renamed to NetworkEntity__deprecated) in favor of the new protobuf component

Technical Details

The main improvement is the introduction of synchronized tweens using a global clock. The system:

• Tracks tween start times using startSyncedTimestamp
• Calculates proper start times for in-progress tweens
• Only processes tweens when the clock is synchronized and network communications are initialized
• Handles both new and existing tweens appropriately

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Test this pull request

• The @dcl/sdk package can be tested in scenes by running

  npm install "https://sdk-team-cdn.decentraland.org/@dcl/js-sdk-toolchain/branch/feat/sync-time/dcl-sdk-7.8.10-15323969967.commit-6cdc35d.tgz"

• To test with npx init

  export SDK_COMMANDS="https://sdk-team-cdn.decentraland.org/@dcl/js-sdk-toolchain/branch/feat/sync-time/dcl-sdk-commands-7.8.10-15323969967.commit-6cdc35d.tgz"
  npx $SDK_COMMANDS init

• The @dcl/inspector package can be tested by visiting this url

  • Or by installing it via NPM

  npm install "https://sdk-team-cdn.decentraland.org/@dcl/js-sdk-toolchain/branch/feat/sync-time/@dcl/inspector/dcl-inspector-7.8.10-15323969967.commit-6cdc35d.tgz"

• The /changerealm command to test test in-world

  /changerealm https://sdk-team-cdn.decentraland.org/ipfs/feat/sync-time-e2e
  

• You can preview this build entering:
  https://playground.decentraland.org/?sdk-branch=feat/sync-time