feat: bump version 0.7.0

[iomarmochtar]

[0.7.0]

Features and Enhancements

• [cli] adjustable container executor per program
• [cli] support custom sandbox executor class for extendable parameters
• [config] add default custom executor for apple_container
• [config] set volume type as optional
• [config] fetch another and merge another property by using fetch_prop(location)
• [config] toggleable fetch_prop(location) by env SNDK_FETCH_PROP (value yes)
• [config] flatten if the container caller is array and the result of fetch_prop(location) helper is an array
• [packaging] actual version will be injected during build and publish pipeline