Tesla Inc.’s plans to lease nearly 1 million square feet in Kyle sent ripples through the regional economy when it was announced last year, even though specific details of what the Austin-based electric vehicle maker had in store were not available at the time. Recent filings with the state and city, plus job postings on the company’s website, are beginning to bring those plans into focus. At the end of this report, check out a list of the largest manufacturing firms in the Austin metro.