Prepare changelog for 3.0.1

Nothing is released yet, but might as well get in the habit of keeping
that changelog up to date, so further fixes can be added to it as they
are made. Future me will thank past me for it.

Author: mrdaemon

docs/source/changelog/3.0.0.md

@@ -1,5 +1,7 @@
 # 3.0.0 - Reboots, Palettes, Sorting and refreshed CLI
 
+*Released Jul 02, 2026*
+
 The first major version release actually backed by a major set of changes.
 This release lands several long overdue features, refactors a lot of internals,
 swaps out the entire CLI engine and provides a much more polished help and

docs/source/changelog/3.0.1.md

@@ -0,0 +1,7 @@
+# 3.0.1 - Current Development
+
+*Note: This is the current development branch and is not yet released.*
+
+## Documentation
+
+- Docs: Fix minor grammar and render nits