chore: bump version to 0.2.0 and add versions.json

Reflects i18n (en/de) release. Creates versions.json required by
Obsidian plugin registry, covering upgrade path from 0.1.0.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

manifest.json

@@ -1,7 +1,7 @@
 {
   "id": "obsidian-micropub",
   "name": "Micropub Publisher",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "minAppVersion": "1.4.0",
   "description": "Publish notes to any Micropub-compatible endpoint (Indiekit, micro.blog, etc.) with support for Digital Garden stages.",
   "author": "Sven",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "obsidian-micropub",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "Obsidian plugin: publish to any Micropub endpoint",
   "main": "main.js",
   "scripts": {

versions.json

@@ -0,0 +1,4 @@
+{
+  "0.1.0": "1.4.0",
+  "0.2.0": "1.4.0"
+}