v3.0.0 Normalize FJSX15 scopes; Enhance external color scheme support

[borela]

• FJSX15 ([FJSX15] Expression and statement prediction enhancement; Scope normalization; Candyman support #28)
• JSX ([FJSX15] Expression and statement prediction enhancement; Scope normalization; Candyman support #28)
• Upgrade Candyman to use the normalized scopes ([FJSX15] Expression and statement prediction enhancement; Scope normalization; Candyman support #28)

Drop in favor of the core syntaxes.

• JSON (Drop JSON and XML #39)
• XML (Drop JSON and XML #39)

Drop bundled color schemes in favor of external ones:

• Bittersweet (Remove old color schemes in favor of external original ones #31)
• Boxy Ocean (Remove old color schemes in favor of external original ones #31)
• Monokai (Remove old color schemes in favor of external original ones #31)