Migrate blog and docs starters to content collections (#5858)

* docs: update README for `content/`

* chore: update env

* feat: update blog to use content collections

* chore: remove with-content starter

* fix: single quotes -> double

* feat: update docs starter to content collections

* refactor: config -> consts

* chore: import type

* edit: Astro will -> Use

Co-authored-by: Sarah Rainsberger <sarah@rainsberger.ca>

* chore: remove unused null check

* nit: spacing

* nit: `as Props` 1

Co-authored-by: Nate Moore <natemoo-re@users.noreply.github.com>

* nit: `as Props` 2

Co-authored-by: Nate Moore <natemoo-re@users.noreply.github.com>

* chore: consistent CONSTS usage

* chore: `type` imports at top

* chore: consistent quote usage on YAML

* chore: remove `as Props` from docs

Co-authored-by: Sarah Rainsberger <sarah@rainsberger.ca>
Co-authored-by: Nate Moore <natemoo-re@users.noreply.github.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/examples/docs/src/consts.ts b/examples/docs/src/consts.ts
new file mode 100644
index 000000000..6486f0325
--- /dev/null
+++ b/examples/docs/src/consts.ts
@@ -0,0 +1,46 @@
+export const SITE = {
+	title: 'Documentation',
+	description: 'Your website description.',
+	defaultLanguage: 'en-us',
+} as const;
+
+export const OPEN_GRAPH = {
+	image: {
+		src: 'https://github.com/withastro/astro/blob/main/assets/social/banner-minimal.png?raw=true',
+		alt:
+			'astro logo on a starry expanse of space,' +
+			' with a purple saturn-like planet floating in the right foreground',
+	},
+	twitter: 'astrodotbuild',
+};
+
+export const KNOWN_LANGUAGES = {
+	English: 'en',
+} as const;
+export const KNOWN_LANGUAGE_CODES = Object.values(KNOWN_LANGUAGES);
+
+export const GITHUB_EDIT_URL = `https://github.com/withastro/astro/tree/main/examples/docs`;
+
+export const COMMUNITY_INVITE_URL = `https://astro.build/chat`;
+
+// See "Algolia" section of the README for more information.
+export const ALGOLIA = {
+	indexName: 'XXXXXXXXXX',
+	appId: 'XXXXXXXXXX',
+	apiKey: 'XXXXXXXXXX',
+};
+
+export type Sidebar = Record<
+	(typeof KNOWN_LANGUAGE_CODES)[number],
+	Record<string, { text: string; link: string }[]>
+>;
+export const SIDEBAR: Sidebar = {
+	en: {
+		'Section Header': [
+			{ text: 'Introduction', link: 'en/introduction' },
+			{ text: 'Page 2', link: 'en/page-2' },
+			{ text: 'Page 3', link: 'en/page-3' },
+		],
+		'Another Section': [{ text: 'Page 4', link: 'en/page-4' }],
+	},
+};