Create googet db (#135)

* Replace the googet state file with a sqlite db. This will automatically convert the existing state file.
* Introduce --format for installed, with the options being simple(default) and json
* Allow "installed" to run without a lock
* Detect which application we are installing and associate that to the package metadata
* Add installdate to PackageState struct

Correct goospec version

Run go mod tidy

Update dependcies, specifically new logger library

Add source field in googet spec. (#79)

 Allow for goopack variables (#64)

Add Conflicts and Replaces to the PkgSpec (#33)

Package Conflicts will prevent the package from being installed if a conflicting package is already installed
Package Replaces will remove any packages that are replaced by one being installed

Add needed comma to goospec

Add clean subcommand and a few other things

* Pull version in build scripts out off goospec
* Add clean subcommand
* Use filepath.ToSlash in goopack

Initial commit