New: Add vue/max-len rule

[ota-meshi]

This PR adds the vue/max-len rule.

vue/max-len rule enforces a maximum line length to increase code readability and maintainability.
vue/max-len rule is the similar rule as core max-len rule but it applies to the source code in .vue.

The following options are available for the vue/max-len rule.

• code ... enforces a maximum line length. default 80
• template ... enforces a maximum line length for <template>. defaults to value of code
• tabWidth ... specifies the character width for tab characters. default 2
• comments ... enforces a maximum line length for comments. defaults to value of code
• ignorePattern ... ignores lines matching a regular expression. can only match a single line and need to be double escaped when written in YAML or JSON
• ignoreComments ... if true, ignores all trailing comments and comments on their own line. default false
• ignoreTrailingComments ... if true, ignores only trailing comments. default false
• ignoreUrls ... if true, ignores lines that contain a URL. default false
• ignoreStrings ... if true, ignores lines that contain a double-quoted or single-quoted string. default false
• ignoreTemplateLiterals ... if true, ignores lines that contain a template literal. default false
• ignoreRegExpLiterals ... if true, ignores lines that contain a RegExp literal. default false
• ignoreHTMLAttributeValues ... if true, ignores lines that contain a HTML attribute value. default false
• ignoreHTMLTextContents ... if true, ignores lines that contain a HTML text content. default false

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close #731