Update changelog and README for new features and fixes

Added details about shared numbering for directive groups, fixed CSS inconsistencies, and documented the notation directive in CHANGELOG.md. Updated README.md to include the notation directive, mention shared numbering, and clarify styling options.

Author: douden

CHANGELOG.md

@@ -4,7 +4,13 @@
 
 ### Added
 
-- Options for customizing proof directive title format.
+- Options for customizing proof directive title format. [#163](https://github.com/executablebooks/sphinx-proof/pull/163)
+- Possibility for shared numbering of groups of directives, fixing [\#64](https://github.com/executablebooks/sphinx-proof/issues/64). [\#https://github.com/executablebooks/sphinx-proof/pull/161](https://github.com/executablebooks/sphinx-proof/pull/161)
+
+### Fixed
+
+- Inconsistencies and missing colors within CSS styles. [b337c21](https://github.com/executablebooks/sphinx-proof/commit/b337c21675464224a4418beb9e70d3b6dc8e4127)
+- Missing documentation for notation directive. [6f33744](https://github.com/executablebooks/sphinx-proof/commit/6f33744544b7596a30beba5b8807491d642b77a7) and [b15c7c0](https://github.com/executablebooks/sphinx-proof/commit/b15c7c09adefe85e0fdb8dea6dc460bd0f51fb1f)
 
 ## v0.3.0 (2025-10-20)
 

README.md

@@ -10,16 +10,18 @@
 
 This package contains a [Sphinx](http://www.sphinx-doc.org/) extension
 for producing proof, theorem, axiom, lemma, definition, criterion, remark, conjecture,
-corollary, algorithm, example, property, observation, proposition and assumption directives.
+corollary, algorithm, example, property, observation, proposition, assumption and notation directives.
 
 ## Features
 
 - **15 directive types** for mathematical proofs and theorems
 - **Automatic numbering** of directives
+  - optional shared numbering of groups of directives
 - **Cross-referencing** support via `prf:ref` role
 - **33 languages supported** - Complete translations for all directive types in English plus 32 additional languages (Arabic, Bengali, Bulgarian, Chinese, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Spanish, Swedish, Thai, Turkish, Ukrainian, Urdu, Vietnamese)
-- **Customizable styling** with multiple theme options
-
+- **Customizable styling** with:
+  - two theme options
+  - directive title format customization
 
 ## Get started