Templates HTML highlight, emmet and symbol pairs

[NoxLP]

The title says it all, just a few config changes:

• Add HTML highlight in templates by adding HTML as embedded language in the package.json mojolicious value, so the dict tag in line 91 of Mojolicious.tmLanguage affect the highlighting.
• Add emmet to the templates by adding mojolicious language to the emmet.includeLanguages vscode configuration (.vscode/settings.json)
• Symbols pairs in language-configuration.json for <>, and <%%> (which should include also <%= and <%==)

Also there was a warning in the package.json categories value that is solved now.