Add editor, prettier, and ignore dotfiles

.gitignore extended for TypeScript/Node build artifacts on top of the
prompts-repo template. .editorconfig and .prettierrc match the prompts
template (4-space indents, prose-wrap always for markdown).

.dockerignore

@@ -0,0 +1,8 @@
+.git
+node_modules
+dist
+build
+coverage
+.DS_Store
+.env
+.env.*

.editorconfig

@@ -0,0 +1,12 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[Makefile]
+indent_style = tab

.gitignore

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+# OS
+.DS_Store
+Thumbs.db
+
+# Editors
+*.swp
+*.swo
+*~
+*.bak
+.idea/
+.vscode/
+*.sublime-*
+
+# Node
+node_modules/
+
+# TypeScript / build artifacts
+dist/
+build/
+*.tsbuildinfo
+coverage/
+.nyc_output/
+
+# Vitest
+.vitest-cache/
+
+# Environment / secrets
+.env
+.env.*
+*.pem
+*.key
+
+# quack runtime data (in case anyone runs the CLI from inside the repo)
+.quack/

.prettierignore

@@ -0,0 +1,5 @@
+node_modules/
+yarn.lock
+dist/
+build/
+coverage/

.prettierrc

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+{
+    "tabWidth": 4,
+    "proseWrap": "always"
+}