NES Fully Upgraded to NEXT

Features
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NES Core Capability Upgrade: From passive completion to proactive prediction. Now supports cross-file edit prediction, automatic dependency imports, and more—enhanced capabilities with a refined user experience.
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Context Selection Optimization: Enhanced context menu options to support adding images, local files, and more—including drag-and-drop image insertion. Removed the @gitCommit and @codeChanges options from the menu, as the Agent can now autonomously gather relevant context. Additionally, improved the presentation of contextual content.
Improvements
- Added QODER_AGENT environment variable for Agent terminal execution to skip heavy shell theme loading.
Fixed
- Fixed lag issues in certain scenarios

