Blocks palette: tabs, options, drag insertion and -INSERT

Rebuild the Blocks palette with Current Drawing / Recent / Favorites /
Libraries tabs, wildcard filter, six views, insertion options, click and
drop insertion and a block context menu. INSERT opens the palette, the
new -INSERT runs on the command line, the ribbon Insert button becomes a
block gallery, and BLOCKMRULIST, BLOCKREDEFINEMODE, BLOCKNAVIGATE,
BLOCKSTATE, EXPLMODE and INSNAME are added.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/modules/draw/mod.rs

@@ -202,7 +202,7 @@ impl CadModule for DrawModule {
                     title: "Block",
                     tools: vec![
                         RibbonItem::LargeTool(create_block::tool()),
-                        RibbonItem::LargeTool(insert_block::tool()),
+                        insert_block::gallery(),
                     ],
                 },
                 RibbonGroup {

src/modules/insert/mod.rs

@@ -105,7 +105,7 @@ impl CadModule for InsertModule {
                     title: "Block",
                     tools: vec![
                         RibbonItem::LargeTool(mview_block::tool()),
-                        RibbonItem::LargeTool(insert_block::tool()),
+                        insert_block::gallery(),
                         RibbonItem::Tool(create_block::tool()),
                         RibbonItem::Tool(edit_block::tool()),
                         RibbonItem::Tool(base_point::tool()),