- Standardize bash shebangs to `#!/usr/bin/env bash` for portability
- Remove `function` keyword from definitions, use `func-name() {` syntax
- Replace `[ ]` conditionals with `[[ ]]` for improved functionality
- Convert local variables to lowercase with `local` keyword
- Update arithmetic comparisons to use `(( ))` syntax
- Enhance `save-dotenv-to-keepass` script with entry existence check and attachment handling
- Fix function name typo in `save-pass-to-keepass`
- Improve CSS formatting and layout for documentation
- Clean up markdown formatting in library and patterns docs