v0.4.0: First alpha release

In an attempt to drive a more production-like process prior to v1, I'm going to start releasing periodic alpha and beta releases. I'm not going to list all of our current features, but instead I'll list the things that need to happen for us to hit beta (i.e. v0.5+) and final release (i.e. v1+).

Alpha development (v0.4.x and lower):

Expected state:

• Where we're currently at

Development process:

• Focus on features and rapid development
• Breaking changes in master can happen; we'll make some attempt to keep each release stable though

Beta development (v0.5.x through v0.9.x):

Expected state:

• Fully decoupled from gxui
  • gxui will still be the default UI, but it should be possible to override it with other UI libraries via plugins
• LSP is supported via an internal Bindable type.
• All current go-specific plugins that can be moved to LSP are using LSP

Development process:

• Focus on stability and regression tests
• Polish the existing UX
• Add build scripts to create installers (at minimum: .deb, .rpm, .ebuild, .pkgbuild, .dmg [or some other darwin installer], and .exe [or some other windows installer])
• Work on a release pipeline
• Set up a plugin registry
• Most new features will be third party plugins (i.e. not included in the main vidar repo)

Final release:

Expected state:

• No data loss is possible
• No known bugs
• Plugins work on all three major OSes (linux, darwin, windows)
  • This is dependent on windows support for go's internal plugin library
• Automated releases of all expected installers via a release pipeline

Development process:

• The core vidar codebase will mostly focus on bug fixes
• Any new features to vidar itself will not be user-facing
  • We expect these changes to only be to support third party plugins that need functionality from vidar to be exposed.
• Focus on third party plugins