Add multi-file upload capability to SDKs

[0div]

Description

Update the js-sdk write method to work as follows and adapt tests

import { Sandbox } from 'e2b'

const sbx = await Sandbox.create()

const infos = sbx.files.write([
    { path: "/path/to/a", data: "<blob>" },
    { path: "/path/to/b", data: "<blob>" },
], filesystemRequestOpts)

console.log('Files created', infos)
// [
//     { "name": "a", "path": "/path/to/a" },
//     { "name": "b", "path": "/path/to/b" }
//  ]

Upadte the python-sdk write method as well

from e2b import Sandbox

sbx = Sandbox()

files = []
for i in range(10):
    path = f"test_write_{i}.txt"
    content = f"This is a test file {i}."
    files.append({"path": path, "data": content})

infos = sbx.files.write(files)
print('Files created', infos)
# [
#   { "name": "a", "path": "/path/to/a" },
#   { "name": "b", "path": "/path/to/b" }
#  ]

Test

cd packages/js-sdk
pnpm test

cd packages/python-sdk
pnpm test

[changeset-bot]

🦋 Changeset detected

Latest commit: 832caa9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
@e2b/python-sdk	Major
e2b	Major
@e2b/cli	Patch

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[mlejva]

@0div please also add/update docs to reflect the breaking change once the SDK ergonomics are set

[0div]

per discussion, moving towards overloading approach
#451