VS Code ChordPro extension

Added release scripts and contributions from bbeardsley:

• Partial syntax snippets
• Disable word based suggestions

VS Code ChordPro extension

This is the first release of VS Code ChordPro extension.
With it comes syntax highlighting support for one of the best song lyrics and chords format.

Future releases will have, at some point in time, improvements in the highlighting (add coloring by groups), and what's listed on the check list, in the Features section.

To check the latest changes, read the CHANGELOG.md.