Fix version in pyproject.toml for v0.7.0 release

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: kasperjunge

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "agr"
-version = "0.6.4"
+version = "0.7.0"
 description = "Agent Resources - A package and project manager for AI agents."
 readme = "README.md"
 requires-python = ">=3.10"