fix(cli): handle dot input and validate npm package names

[ProdigyRahul]

added:

// NPM package name validation regex
const VALID_PACKAGE_NAME = /^(?:(?:@(?:[a-z0-9-][a-z0-9-.])?/)?[a-z0-9-._~][a-z0-9-]|[a-z0-9-])$/

// Function to sanitize package name
const sanitizePackageName = (name: string): string => {
return name
.toLowerCase()
.replace(/[^a-z0-9-~]/g, '-')
.replace(/^[._]/, '')
.replace(/^-+|-+$/g, '')
|| 'jstack-app'
}

and also added this validation:
// Handle "." input by using current directory name
if (value === ".") {
const currentDir = path.basename(process.cwd())
value = currentDir
}

    // Validate against npm package name rules
    if (!VALID_PACKAGE_NAME.test(value)) {
      const sanitized = sanitizePackageName(value)
      return `Invalid package name. Try: ${sanitized}`
    }

[ProdigyRahul]

I've submitted a PR to a public open-source repo. Hoping they merge it. >_< @joschan21