Add configuration files and scripts for project standards enforcement

- Introduced .editorconfig for consistent coding styles.
- Added .gitattributes to manage line endings and text attributes.
- Created README.md for Git hooks usage and configuration.
- Implemented pre-commit hook to enforce executable permissions and LF line endings for shell scripts.
- Updated .gitignore to include additional build artifacts and directories.
- Enhanced AGENTS.md and Definition of Done documentation with testing standards.
- Modified reconciliation scripts to include new configuration files and templates.

.gitattributes

@@ -0,0 +1,18 @@
+* text=auto
+
+# Ensure LF for shell scripts and common source/docs files
+*.sh text eol=lf
+*.bash text eol=lf
+*.zsh text eol=lf
+*.go text eol=lf
+*.mod text eol=lf
+*.sum text eol=lf
+*.md text eol=lf
+*.yml text eol=lf
+*.yaml text eol=lf
+Makefile text eol=lf
+
+# Keep native Windows script formats
+*.ps1 text eol=crlf
+*.bat text eol=crlf
+*.cmd text eol=crlf