Create initial language support

Create support for languages, then reformat user, home, and post pages
to use it, and create en and en-us language files.

src/lang/utils/base.template.js

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+// This file is a template.
+
+const data = {
+	// CONTENT
+}
+
+module.exports = data

src/lang/utils/base.txt

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+# Front page
+
+# Top section
+go_to_profile
+go_to_post
+go_username_or_url
+go_shortcode_or_url
+go_button
+
+# Bottom section
+about_bibliogram_header
+pug_about_bibliogram_content
+about_this_instance_header
+onion_site_available
+t_settings
+t_privacy_policy
+has_not_written_privacy_policy
+instance_not_blocked
+instance_partially_blocked
+instance_blocked
+rss_enabled
+rss_disabled
+external_links_header
+source_link
+matrix_link
+instances_link
+contact_link
+t_featured_profiles
+featured_profiles_whats_this
+html_featured_profiles_disclaimer
+
+# User page
+
+verified_badge_alt
+verified_badge_title
+post_counter_label
+outgoing_follows_counter_label
+incoming_follows_counter_label
+t_home
+tab_timeline
+tab_igtv
+next_page_button
+next_page_button_loading
+profile_is_private_notice
+no_posts_notice
+no_more_posts_notice
+fn_page_divider
+
+# Post page
+
+pug_post_timestamp

src/lang/utils/build_base.js

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+const fs = require("fs").promises
+const pj = require("path").join
+
+;(async () => {
+	const contents = await fs.readFile(pj(__dirname, "base.txt"), "utf8")
+	const lines = contents.split("\n")
+	let template = await fs.readFile(pj(__dirname, "base.template.js"), "utf8")
+
+	template = template
+		.replace("// This file is a template.", "// This file was automatically generated and its contents will be overwritten later.")
+		.replace("// CONTENT", lines
+			.filter(l => l && !l.startsWith("#"))
+			.map(l => {
+				if (l.startsWith("pug_")) {
+					return `"${l}": locals => "MISSING TEMPLATE: ${l}"`
+				} else if (l.startsWith("fn_")) {
+					return `"${l}": () => "MISSING FUNCTION: ${l}"`
+				} else {
+					return `"${l}": "MISSING STRING: ${l}"`
+				}
+			})
+			.join(",\n\t")
+		)
+
+	await fs.writeFile(pj(__dirname, "../base.js"), template, "utf8")
+
+	console.log("base.js written.")
+})()