Add watch dir recursive option

[dobrac]

Add recursive directory watch support to the envd. It uses not yet released recursive feature of fsnotify library. This library was forked to https://github.com/e2b-dev/fsnotify and is now included instead of the original one.

Updated API with the recursive parameter as:

message CreateWatcherRequest {
    string path = 1;
    bool recursive = 2;
}

It should be backwards compatible, as all fields in protobuf are optional. The default value is recursive=false.

Important restriction
This change limits the compatibility to Linux, Windows only.

✨

Description by Callstackai

This PR adds recursive directory watch support to the envd, utilizing a forked version of the fsnotify library. It introduces a new recursive parameter in the WatchDirRequest and CreateWatcherRequest messages, ensuring backward compatibility.

Diagrams of code changes

sequenceDiagram
    participant Client
    participant FileSystem Service
    participant FSNotify Watcher

    Client->>FileSystem Service: CreateWatcher(path, recursive)
    FileSystem Service->>FSNotify Watcher: Create new watcher
    FSNotify Watcher-->>FileSystem Service: Return watcher instance
    
    alt recursive watching
        FileSystem Service->>FSNotify Watcher: Add path with "..." suffix
    else non-recursive watching
        FileSystem Service->>FSNotify Watcher: Add path without suffix
    end
    
    FileSystem Service-->>Client: Return watcher_id
    
    loop File System Events
        FSNotify Watcher->>FileSystem Service: Emit events (Create/Write/Remove/Rename/Chmod)
        FileSystem Service->>Client: Stream events
    end
    
    Client->>FileSystem Service: RemoveWatcher(watcher_id)
    FileSystem Service->>FSNotify Watcher: Close watcher
    FileSystem Service-->>Client: Confirm removal

Loading

Files Changed

File	Summary
go.work.sum	Updated dependencies to include the new fsnotify library.
packages/envd/internal/services/filesystem/watch.go	Modified the WatchDir function to use the new recursive path utility.
packages/envd/internal/services/filesystem/watch_sync.go	Updated CreateFileWatcher to accept a recursive parameter.
packages/envd/internal/services/spec/filesystem/filesystem.pb.go	Added recursive field to WatchDirRequest and CreateWatcherRequest messages.
packages/envd/internal/utils/rfsnotify.go	Created a utility function to handle recursive path creation.
packages/envd/main.go	Updated version number to reflect changes.
packages/envd/spec/filesystem/filesystem.proto	Updated proto definitions to include recursive parameter.

This PR includes files in programming languages that we currently do not support. We have not reviewed files with the extensions .sum, .go, .proto. See list of supported languages.

[0div]

Same comment as for SDK PR:

From a product perspective, do you think it would be better not to make the recursive an option always and just always watch recursively ? Also taking into account that the instructions said:

Make as few changes to the communication between envd and SDKs as possible