Add: application layer for sandbox details/inspect view

[ben-fornefeld]

A mermaid flow chart giving an overview of the application layer for the sandbox details/inspect view can be found here.

This PR introduces a new application layer for the sandbox details/inspect view in the dashboard. Major changes include:

• New Context Providers: Adds SandboxProvider and SandboxInspectProvider for managing sandbox state and filesystem inspection context within the dashboard.
• Filesystem Abstractions: Introduces a set of files (context.tsx, inspect/context.tsx, inspect/filesystem/events-manager.ts, inspect/filesystem/store.ts) to abstract and manage filesystem state, events, and operations, including directory watching, loading, refreshing, and event handling.
• Dependency Updates:
  • Adds the e2b package (^1.5.3) and related tools to package.json and lockfile.
  • Removes protobuf and ConnectRPC generation dependencies and their configs (buf.gen.yaml, .proto files).
• Test and Layout Adjustments:
  • Updates test assertions to use stricter TypeScript checks.
  • Minor import fix in dashboard layout to use the new server context location.

Notable Removals

• Removes all proto files and local buf/gen configs for the old gRPC-based environment layer.
• Cleans up related scripts and dependencies.

Completes E2B-2478, Completes E2B-2482

[linear]

E2B-2463 Implement application layer and state abstractions

[vercel]

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[linear]

E2B-2478 Sandbox connection/state management

E2B-2482 FS state management