1. Add indicator for objed state.
2. New modal segment.
3. Add options: doom-modeline-buffer-state-icon and doom-modeline-buffer-modification-icon.
4. Set correct font width for `all-the-icons' for appropriate mode-line width.
5. Improve buffer icons.
6. Add face for doc-face.
7. Improve lsp indicator.
8. Improve battery indicator.
9. Bug fixing and other improvements.