chore: configure code quality tools

Add EditorConfig for consistent editor settings, Prettier for formatting (4-space indentation), ESLint with TypeScript rules, and linting documentation

.editorconfig

@@ -0,0 +1,37 @@
+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# TypeScript, JavaScript files
+[*.{ts,tsx,js,jsx,mjs,cjs}]
+indent_style = space
+indent_size = 4
+max_line_length = 160
+
+# JSON, YAML files
+[*.{json,yaml,yml}]
+indent_style = space
+indent_size = 4
+
+# Markdown files
+[*.md]
+trim_trailing_whitespace = false
+max_line_length = off
+
+# Package.json
+[package.json]
+indent_style = space
+indent_size = 4
+
+# Shell scripts
+[*.sh]
+indent_style = space
+indent_size = 4