Add period note commands with hotkeys and next/prev navigation

- Add 5 'Go to' commands with default hotkeys:
  Ctrl+Shift+Alt+D/W/M/Q/Y for daily/weekly/monthly/quarterly/yearly
- Add 10 navigation commands (next/prev) for each period type
- Add detectPeriodType() and navigatePeriodNote() helpers
- Bump version to 1.1.0

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "waypoint",
-	"version": "1.0.0",
+	"version": "1.1.0",
 	"description": "Calendar, recent files, and custom bookmarks sidebar.",
 	"main": "main.js",
 	"scripts": {