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.

.editorconfig

@@ -0,0 +1,19 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 4
+
+[*.go]
+indent_style = tab
+indent_size = 4
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.ps1]
+end_of_line = crlf