chore(vim): add UltiSnips, configuration, and custom snippets for JavaScript

nvim/plugins/ultisnips.vim

@@ -0,0 +1,13 @@
+" UltiSnips
+" https://github.com/SirVer/ultisnips
+
+let g:UltiSnipsSnippetDirectories = ["ultisnips"]
+let g:UltiSnipsExpandTrigger="<tab>"
+let g:UltiSnipsJumpForwardTrigger="<c-j>"
+let g:UltiSnipsJumpBackwardTrigger="<c-k>"
+let g:UltiSnipsEditSplit="vertical"
+let g:ultisnips_javascript = {
+  \ 'keyword-spacing': 'always',
+  \ 'semi': 'always',
+  \ 'space-before-function-paren': 'never'
+  \ }