feat(quantity): create module

#3

.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+indent_size = 2
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+# Graphics
+[*.{eps,gif,ico,jpeg,jpg,png,tif,tiff}]
+charset = unset
+end_of_line = unset
+indent_size = unset
+indent_style = unset
+insert_final_newline = unset
+tab_width = unset
+trim_trailing_whitespace = unset
+
+# Other documents
+[*.{doc,DOC,docx,DOCX,dot,DOT,PDF,pdf,rtf,RTF}]
+charset = unset
+end_of_line = unset
+indent_size = unset
+indent_style = unset
+insert_final_newline = unset
+tab_width = unset
+trim_trailing_whitespace = unset

.env.defaults

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+# .env.defaults, committed to repo
+
+## See https://github.com/keithmorris/node-dotenv-extended/#readme
+## ⛔️
+## 🚫  DO NOT COMMIT YOUR ACTUAL .env file to version control.
+## 🚫  It should only include environment-specific values such
+## 🚫  as database passwords or API keys.
+## 🚫  Your production database should have a different password
+## 🚫  than your development database.
+
+# Codacy
+
+CODACY_PROJECT_TOKEN=
+
+# CodeClimate
+
+CC_TEST_REPORTER_ID=
+
+#
+# Product manifest (package.json) variables
+#
+
+NODE_ENV=development
+NPM_PACKAGE_NAME=@archetypes/quantity
+NPM_PACKAGE_VERSION=
+
+#
+# Jest JUnit for JavaScript BDD test suites
+# @see https://github.com/jest-community/jest-junit#configuration
+#
+
+# name attribute of <testsuites>
+# @default "jest tests"
+JEST_SUITE_NAME=@archetypes/quantity tests
+
+# File path to save the output.
+# @default "./junit.xml"
+JEST_JUNIT_OUTPUT=./jest-junit.xml
+
+# Directory to save the output.
+# null
+JEST_JUNIT_OUTPUT_DIR=
+
+# File name for the output.
+# @default "./junit.xml"
+JEST_JUNIT_OUTPUT_NAME=./jest-junit.xml
+
+# Template string for name attribute of the <testsuite>.
+# @default "{title}"
+JEST_JUNIT_SUITE_NAME=
+
+# Template string for the classname attribute of <testcase>.
+# @default "{classname} {title}"
+JEST_JUNIT_CLASSNAME=
+
+# Template string for the name attribute of <testcase>.
+# @default "{classname} {title}"
+JEST_JUNIT_TITLE=
+
+# Character(s) used to join the describe blocks.
+# @default " "
+JEST_JUNIT_ANCESTOR_SEPARATOR=
+
+# DEPRECATED. Use suiteNameTemplate instead. Use file path as the name attribute of <testsuite>
+# @default "false"
+JEST_USE_PATH_FOR_SUITE_NAME=
+
+#
+# RollupJS
+
+BUILD=production
+INCLUDE_DEPS=true
+
+#
+# SonarCloud variable defaults
+#
+
+# SonarCloud static code analysis
+
+SONAR_BRANCH_NAME=
+SONAR_BRANCH_TARGET=master
+SONAR_HOST_URL=https://sonarcloud.io
+SONAR_ORGANIZATION=commonality
+SONAR_PROJECT_DESCRIPTION=Represents an amount of something measured according to some standard of measurement.
+SONAR_PROJECT_KEY=commonality_archetypes-quantity
+SONAR_PROJECT_NAME=@archetypes/quantity
+SONAR_PROJECT_VERSION=
+SONAR_TOKEN=

.env.schema

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+# .env.schema, committed to repo
+
+## See https://github.com/keithmorris/node-dotenv-extended/#readme
+## ⛔️
+## 🚫  DO NOT COMMIT YOUR ACTUAL .env file to version control.
+## 🚫  It should only include environment-specific values such
+## 🚫  as database passwords or API keys.
+## 🚫  Your production database should have a different password
+## 🚫  than your development database.
+
+# Codacy
+
+CODACY_PROJECT_TOKEN=
+
+# CodeClimate
+
+CC_TEST_REPORTER_ID=
+
+NODE_ENV=
+
+#
+# Product manifest (package.json) variables
+#
+
+NPM_PACKAGE_NAME=
+NPM_PACKAGE_VERSION=
+
+#
+# Jest JUnit for JavaScript BDD test suites
+# @see https://github.com/jest-community/jest-junit#configuration
+#
+
+# name attribute of <testsuites>
+# @default "jest tests"
+JEST_SUITE_NAME=
+
+# File path to save the output.
+# @default "./junit.xml"
+JEST_JUNIT_OUTPUT=
+
+# Directory to save the output.
+# null
+JEST_JUNIT_OUTPUT_DIR=
+
+# File name for the output.
+# @default "./junit.xml"
+JEST_JUNIT_OUTPUT_NAME=
+
+# Template string for name attribute of the <testsuite>.
+# @default "{title}"
+JEST_JUNIT_SUITE_NAME=
+
+# Template string for the classname attribute of <testcase>.
+# @default "{classname} {title}"
+JEST_JUNIT_CLASSNAME=
+
+# Template string for the name attribute of <testcase>.
+# @default "{classname} {title}"
+JEST_JUNIT_TITLE=
+
+# Character(s) used to join the describe blocks.
+# @default " "
+JEST_JUNIT_ANCESTOR_SEPARATOR=
+
+# DEPRECATED. Use suiteNameTemplate instead. Use file path as the name attribute of <testsuite>
+# @default "false"
+JEST_USE_PATH_FOR_SUITE_NAME=
+
+## Rollup.js
+
+BUILD=
+INCLUDE_DEPS=
+
+#
+# SonarCloud variables (CI/CD code analysis)
+#
+
+# Name of the current working branch.
+# This is a short-lived branch
+# corresponding to Merge/Pull Requests, feature, and fix branches.
+# To get the current working branch name, run:
+# npm --loglevel silent run vars:git:branch:name
+# @see https://sonarcloud.io/documentation/branches/overview/
+
+
+# The default branch of the repository; it should almost always
+# be "master".
+
+SONAR_BRANCH_NAME=
+SONAR_BRANCH_TARGET=
+SONAR_HOST_URL=
+SONAR_ORGANIZATION=
+SONAR_PROJECT_DESCRIPTION=
+SONAR_PROJECT_KEY=
+SONAR_PROJECT_NAME=
+SONAR_PROJECT_VERSION=
+SONAR_TOKEN=

.eslintignore

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+.gitlab/rc/
+**/__fixtures__/**
+**/__mocks__/**
+**/*.test.js
+babel.config.js
+coverage
+dist/
+docs/
+jest.config.js
+lib/env-config.js
+rollup.config.js
+scripts/