Move Thumbprint README.mdx files to the www/src/pages folder

[danoc]

The Thumbprint README.mdx files are the only ones that are not defined in www/src/pages. Instead, they are created dynamically in gatsby-node.js. This complicates our infrastructure and can be simplified now that we've fully adopted MDX.

The proposal is to move all of the README.mdx files into src/www/pages so that each page on the site is represented by a file in src/www/pages that maps to the URL.

This will allow us to delete this code:

thumbprint/www/gatsby-node.js

Lines 28 to 125 in b802629

	exports.createPages = ({ actions, graphql }) => {
	const { createPage } = actions;
	return new Promise((resolve, reject) => {
	resolve(
	graphql(`
	query ThumprintPages {
	allComponentApi: allMdx(
	filter: { frontmatter: { mdxType: { eq: "componentApi" } } }
	) {
	edges {
	node {
	frontmatter {
	package
	kit
	url
	platform
	}
	parent {
	... on File {
	absolutePath
	relativeDirectory
	}
	}
	}
	}
	}
	# These are all of the kits. We use this to create pages for the ones that have
	# design documentation.
	allKits: allMdx(filter: { frontmatter: { mdxType: { eq: "kit" } } }) {
	edges {
	node {
	frontmatter {
	url
	}
	parent {
	... on File {
	relativePath
	}
	}
	}
	}
	}
	}
	`).then(result => {
	if (result.errors) {
	reject(result.errors);
	}
	result.data.allKits.edges.forEach(({ node }) => {
	const { url } = node.frontmatter;
	if (url) {
	createPage({
	path: url,
	component: path.resolve(
	'./src/components/thumbprint-components/page/index.jsx',
	),
	context: {
	// Example: `button/index.mdx`
	kitPath: node.parent.relativePath,
	isDesignGuidelinesPage: true,
	},
	});
	}
	});
	// Create API documentation for Thumbprint components
	result.data.allComponentApi.edges.forEach(({ node }) => {
	const { frontmatter } = node;
	createPage({
	path: frontmatter.url,
	component: path.resolve(
	'./src/components/thumbprint-components/page/index.jsx',
	),
	context: {
	isDesignGuidelinesPage: false,
	// Example: `@thumbtack/thumbprint-react`
	package: frontmatter.package,
	// Example: `thumbprint-react/components/Button`
	pathToReactComponentFolder:
	frontmatter.platform === 'react'
	? node.parent.relativeDirectory
	: null,
	// Example: `button/index.mdx`
	kitPath: frontmatter.kit,
	// Example: /components/button/react/
	url: frontmatter.url,
	},
	});
	});
	return undefined;
	}),
	);
	});
	};

[danoc]

This is done!