[v3] Add prerequisites to Practice Exercises

.prettierignore

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+# IDE files
+.idea/
+.vscode/
+.vs/
+.ionide/
+
+# GitHub templates
+.github/ISSUE_TEMPLATE/**/*
+
+# Language docs files
+docs/**

.prettierrc

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+{
+  "arrowParens": "always",
+  "bracketSpacing": true,
+  "embeddedLanguageFormatting": "auto",
+  "endOfLine": "auto",
+  "htmlWhitespaceSensitivity": "css",
+  "insertPragma": false,
+  "printWidth": 80,
+  "proseWrap": "preserve",
+  "quoteProps": "as-needed",
+  "semi": false,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "es5",
+  "useTabs": false,
+  "vueIndentScriptAndStyle": false
+}