[ADF-3591] spellcheck support for code (#3827)

* setup spellcheck

cspell.json

@@ -0,0 +1,140 @@
+{
+  "version": "0.1",
+  "language": "en",
+  "words": [
+    "activiti",
+    "CSRF",
+    "glyphicon",
+    "sharedlinks",
+    "Redistributable",
+    "fullscreen",
+    "sidenav",
+    "injectable",
+    "truthy",
+    "cryptodoc",
+    "mysites",
+    "afts",
+    "classlist",
+    "folderlink",
+    "filelink",
+    "datatable",
+    "repo",
+    "snackbar",
+    "promisify",
+    "xdescribe",
+    "unfavorite",
+    "devtools",
+    "gitter",
+    "jira",
+    "markdownlint",
+    "uploader",
+    "nginx",
+    "docx",
+    "SOLR",
+    "unshare",
+    "validators",
+    "guid",
+    "polyfill",
+    "polyfills",
+    "jsonp",
+    "hammerjs",
+    "pdfjs",
+    "xpath",
+    "tooltip",
+    "tooltips",
+    "unindent",
+    "exif",
+    "cardview",
+    "webm",
+    "keycodes",
+    "adhoc",
+    "swimlanes",
+    "datepicker",
+    "waypoints",
+    "waypoint",
+    "hotfix",
+    "typeahead",
+    "gridster",
+    "Collapsable",
+    "rowspan",
+    "typeahead",
+    "tabindex",
+    "Arial",
+    "swsdp",
+    "Datetimepicker",
+    "mimetype",
+    "multiselect",
+    "arrowup",
+    "arrowdown",
+    "dialpad",
+    "backend",
+    "Unclaim",
+    "transclusion",
+    "transcluded",
+    "auditable",
+    "taggable",
+    "datarow",
+    "datacolumn",
+    "textitem",
+    "boolitem",
+    "mapitem",
+    "selectitem",
+    "keyvaluepairsitem",
+    "boolitem",
+    "baseitem",
+    "checkboxes",
+    "tasklist",
+    "dateitem",
+    "webscript",
+    "minlength",
+    "doclib",
+    "fullname",
+    "firstname",
+    "lastname",
+    "userinfo",
+    "qshare",
+    "imgpreview",
+    "AUTHTYPE",
+    "ECMHOST",
+    "BPMHOST",
+    "OAUTHCONFIG",
+    "CONTEXTROOTBPM",
+    "CONTEXTROOTECM",
+    "DISABLECSRF",
+    "printf",
+    "mincount",
+    "listgrid",
+    "filesize",
+    "Theming",
+    "quicktime",
+    "Promise",
+    "Examinate",
+    "highlightable",
+    "Droppable",
+    "UPDATEPERMISSIONS",
+    "Whitespaces",
+    "keyvaluepairs",
+    "datetimeitem",
+    "floatitem",
+    "intitem",
+    "DDTHH",
+    "MLTEXT",
+    "penta",
+    "BASESHAREURL",
+    "hardend",
+    "filedata"
+  ],
+  "dictionaries": [
+    "html",
+    "en-gb",
+    "en_US",
+    "softwareTerms"
+  ],
+  "ignorePaths": [
+    "lib/{content-services,core,extensions,insights,process-services}/**/*.spec.ts",
+    "lib/{content-services,core,extensions,insights,process-services}/**/*.mock.ts"
+  ],
+  "ignoreRegExpList": [
+    "(\"|'|`)((?:\\\\1|(?:(?!\\1).))*)\\1"
+  ]
+}