chore(release): finalize 0.8.0 version metadata

Problem

- Release metadata remained unstaged after docs commit.

- Project version and changelog dates needed to match 0.8.0 release state.

Implementation

- Bumped project version in CMakeLists.txt from 0.7.6 to 0.8.0.

- Updated v0.8.0 release date in changelog index and release note to February 27, 2026.

Tests

- Not run (metadata-only change).

Author: sentomk

CMakeLists.txt

@@ -7,7 +7,7 @@ endif()
 
 # ========== Project ==========
 project(patternia
-  VERSION 0.7.6
+  VERSION 0.8.0
   DESCRIPTION "Header-only pattern matching library for modern C++"
   LANGUAGES CXX
 )

docs/changelog/releases.md

@@ -20,4 +20,4 @@
 - [v0.7.6](v0.7.6.md) - February 21, 2026
 
 ## 0.8.x
-- [v0.8.0](v0.8.0.md) - February 26, 2026
+- [v0.8.0](v0.8.0.md) - February 27, 2026

docs/changelog/v0.8.0.md

@@ -1,6 +1,6 @@
 # Patternia v0.8.0 Release Note
 
-**Release Date:** February 26, 2026  
+**Release Date:** February 27, 2026  
 **Version:** 0.8.0
 
 ---