Adds syntax highlighting to the CLI

[johnedquinn]

Relevant Issue

None.

Description

• Adds syntax highlighting using the SqlLexer and SqlParser
• Highlighting allows all tokens. This is a better revision than the nanorc files (earlier implementation) because we can differentiate between PartiQL and Ion. Ion does not have highlighting at the moment, but the SQLParser helps users identify when they've made a mistake. See the included video below.
• Adds the ability to use --monochrome or -m on the REPL to avoid using syntax highlighting

Preview below:

partiql-cli-new.mov

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[alancai98]

Some really nice work here! Syntax highlighting would definitely be a great feature to add for the PartiQL REPL experience.

Left some questions about the syntax highlighting support from JLine (and if we're restricted to just nanorc files) and additional documentation.

[johnedquinn]

Decided to go ahead and use the SqlLexer and SqlParser instead of the nanorc files because nanorc doesn't allow advanced features such as multiple grammars (hence our inability to differentiate between PartiQL quoted identifiers and Ion strings). Makes the most sense to use our grammar to identify tokens.

I've updated the description with a new video. Later, we can add highlighting for Ion, and this sets us up for that.