added block html option

examples.md

@@ -13,6 +13,7 @@ Root directory manifest (`.wp-materialize.json`):
   "author": { "content": ["editorial"], "inherit": true },
   "renderer": "pandoc",
   "hard_line_breaks": true,
+  "block_html": true,
   "subdirectories": { "content": ["design", "notes"], "inherit": true },
   "files": {
     "post.md": {
@@ -24,6 +25,7 @@ Root directory manifest (`.wp-materialize.json`):
       "use_heading_as_title": { "level": 1, "strict": true },
       "renderer": "py-gfm",
       "hard_line_breaks": false,
+      "block_html": false,
       "created_on": "2025-01-10 09:30",
       "last_modified": "2025-02-14 16:45"
     }
@@ -54,6 +56,7 @@ Subdirectory manifest (`design/.wp-materialize.json`):
   "repo_storage_dir": "/home/user/wp-materialize-repos",
   "renderer": "default",
   "hard_line_breaks": false,
+  "block_html": false,
   "git_repositories": [],
   "directories": [
     {
@@ -73,6 +76,7 @@ Subdirectory manifest (`design/.wp-materialize.json`):
   "repo_storage_dir": "/home/user/wp-materialize-repos",
   "renderer": "default",
   "hard_line_breaks": false,
+  "block_html": false,
   "git_repositories": [
     {
       "name": "content-repo",
@@ -105,6 +109,7 @@ Subdirectory manifest (`design/.wp-materialize.json`):
   "repo_storage_dir": "/home/user/wp-materialize-repos",
   "renderer": "default",
   "hard_line_breaks": false,
+  "block_html": false,
   "git_repositories": [
     {
       "name": "content-repo",