feat: add code-snippets for content creation (#206)

* Create astro-paper.code-snippets

* feat: allow nullable modDatetime

this is needed to allow the snippet to work with a blank date time, and is a precursor of adding in a modified date time setting hook

* Update astro-paper.code-snippets to make feat false by default

.vscode/astro-paper.code-snippets

@@ -0,0 +1,34 @@
+{
+  "Frontmatter": {
+    "scope": "markdown",
+    "prefix": "frontmatter",
+    "body": [
+      "---",
+      "author: $1",
+      "pubDatetime: $CURRENT_YEAR-$CURRENT_MONTH-${CURRENT_DATE}T$CURRENT_HOUR:$CURRENT_MINUTE:$CURRENT_SECOND.000Z",
+      "modDatetime: $3",
+      "title: $4",
+      "featured: ${5|false,true|}",
+      "draft: ${6|true,false|}",
+      "tags:",
+      "  - $7",
+      "description: $8",
+      "---",
+    ],
+    "description": "Adds the frontmatter block for the AstroPaper Blog post"
+  },
+  "Blog Template": {
+    "scope": "markdown",
+    "prefix": "template",
+    "body": [
+      "${1:frontmatter}",
+      "",
+      "${2: Introductory Sentence}",
+      "",
+      "## Table of contents",
+      "",
+      "## ${3: heading 1}",
+    ],
+    "description": "Adds the template for the AstroPaper Blog post. You will need to trigger the snippet modal on the 'frontmatter' line to insert the other snipper."
+  }
+}

src/content/config.ts

@@ -7,7 +7,7 @@ const blog = defineCollection({
     z.object({
       author: z.string().default(SITE.author),
       pubDatetime: z.date(),
-      modDatetime: z.date().optional(),
+      modDatetime: z.date().optional().nullable(),
       title: z.string(),
       featured: z.boolean().optional(),
       draft: z.boolean().optional(),