Adds "Now" page functionality

Implements a "Now" page to share current activities, inspired by nownownow.com.

- Introduces a new content type "now" with corresponding layouts and archetype.
- Adds a "Now" entry to the main menu.
- Creates a script to easily generate new "now" entries.
- Updates the colophon page with information about the "now" page.
- Deletes weeknote config as it isn't in use anymore

weeknote-config.json

@@ -1,50 +0,0 @@
-{
-	"feeds": [
-		{
-			"url": "https://appletune.fundor333.com/api/feed/",
-			"title": "Suggested Reading Links/Posts",
-			"utm_source": "fundor333.com"
-		},
-		{
-			"url": "https://www.fundor333.com/index.xml",
-			"title": "New post from my blog",
-			"utm_source": "fundor333.com"
-		},
-		{
-			"url": "https://newsletter.digitaltearoom.com/rss/",
-			"title": "New post from my newsletter",
-			"utm_source": "fundor333.com"
-		}
-	],
-	"fix_links": [
-		{
-			"url": "https://www.fundor333.com",
-			"title": "My blog",
-			"utm_source": "fundor333.com"
-		},
-		{
-			"url": "https://newsletter.digitaltearoom.com",
-			"title": "My newsletter",
-			"utm_source": "fundor333.com"
-		},
-		{
-			"url": "https://ko-fi.com/fundor333",
-			"title": "Support me",
-			"utm_source": "fundor333.com"
-		}
-	],
-	"generator": {
-		"tag": "week note",
-		"output": "content/weeknotes/",
-		"fix_links_label": "My Links",
-		"type_weeknote": "weeknote",
-		"draft": false
-	},
-	"anilist": { "user_id": "fundor333" },
-	"goodread": {
-		"user_id": "5312887-matteo",
-		"shelf_name_code": "currently-reading",
-		"shelf_name_label": "Currently Reading"
-	},
-	"text_api": "https://appletune.fundor333.com/api/weekdone/?format=json"
-}