Address utf8 support when uploading JavaScript application

[bekindpleaserewind]

What's new

• fz-sdk - address a bug in issue # 4363 causing characters to continue on to the beginning of the js command when writing utf8 files to the device.

Verification

Note index.ts should be a larger typescript utf-8 file.

With updated changes

$ file index.ts
index.ts: JavaScript source, Unicode text, UTF-8 text

$ file dist/automarauder.js 
dist/automarauder.js: JavaScript source, Unicode text, UTF-8 text

$ npx npm run start

> automarauder@1.0.0 start
> npm run build && node node_modules/@next-flip/fz-sdk-mntm/sdk.js upload


> automarauder@1.0.0 build
> tsc && node node_modules/@next-flip/fz-sdk-mntm/sdk.js build

Connecting to Flipper at /dev/ttyACM0
Uploading application file
Launching application
Running script /ext/apps/Scripts/automarauder.js, press CTRL+C to stop
main

Checklist (For Reviewer)

• [ x ] PR has description of feature/bug or link to Confluence/Jira task
• [ x ] Description contains actions to verify feature/bugfix
• [ x ] I've built this code, uploaded it to the device and verified feature/bugfix