Better headings in v4.md

V4.md

@@ -6,12 +6,21 @@ V4 is a complete rewrite of the plugin. As a result:
 -   Most features have been reimplimented with backwards-compatiable behaviour.
 -   There are also some breaking changes (marked with "⚠️").
 
-## Fundamental Changes
+## Usage
+
+You can start using V4 right now by installing it with the BRAT plugin
+
+> [!warning] Your Breadcrumbs settings will be migrated to the new format.
+> Features that have already been reimplemented will retain their old settings. But missing features will lose their settings.
+
+## Changes
+
+### Foundational Changes
 
 -   Nodes are added to the graph using their full path, not just their basename. This fixes issue: TODO
 -   Implied relationships are customizable per-Hierarchy, not just globally. This resolves: TODO
 
-## Features
+### Features
 
 Legend:
 
@@ -20,7 +29,7 @@ Legend:
 -   ❌: Removed, don't plan to implement.
 -   ❔: Undecided for now.
 
-### Graph Builders
+#### Graph Builders
 
 Previously referred to as "Alternative Hierarchies", these are the various ways to add edges to the Breadcrumbs graph.
 
@@ -35,12 +44,12 @@ Previously referred to as "Alternative Hierarchies", these are the various ways
 -   ❔ Regex notes
 -   ❔ Traverse notes
 
-### Commands
+#### Commands
 
 -   ✅ Create index from note (and copy to clipboard)
 -   ⌚ Write Breadcrumbs to file
 
-### Views
+#### Views
 
 -   ✅ Matrix view
 -   ✅ Grid view
@@ -51,15 +60,15 @@ Previously referred to as "Alternative Hierarchies", these are the various ways
 -   ❔ Ducks view
 -   ❔ Tree view
 
-### Codeblocks
+#### Codeblocks
 
 -   ✅ Implemented
 
-### API
+#### API
 
 -   ❔ Probably
 
-## Breaking Changes ⚠️
+#### Breaking Changes ⚠️
 
 -   The `BC-tag-note` field is now called `BC-tag-note-tag`.
     -   You will be notified if any notes use the old syntax, so you can change them.