BEMHTML Language support for Visual Studio Code

Adds BEMHTML syntax highlighting and snippets for Visual Studio Code.

Converted from: https://github.com/jchouse/bemhtml

Snippets

block b -> block blockName,

block b: -> block: 'blockName',

elem e -> elem elemName,

elem e: -> elem: 'elemName',

block + elem be -> block blockName, elem elemName,

mod m -> mod modName modValue,

mods m: -> mods: { modName: 'modValue' },

elemMod em -> elemMod modName modValue,

elemMods em: -> elemMods: { modName: 'modValue' },

mix mi: -> mix: [ { block: blockName } ]

content c: -> content: [ { ... } ]

js js: -> js: { ... }

tag t: -> tag: 'tagName',

attrs a: -> attrs: { ... }

cls cl: -> cls: 'className',

bem: false bf: -> bem: false