新增 niri/dms/gtk/qt/cava/fcitx5 等配置并添加 .gitignore

- 纳入版本管理: niri/(含 dms/), DankMaterialShell/, environment.d/,
  cava/, gtk-3.0/, gtk-4.0/, qt5ct/, qt6ct/, fcitx5/
- 新增 .gitignore: 排除 *.bak/*.backup*、fcitx5/conf/cached_layouts、
  DankMaterialShell 运行时标志
- 同步已有的 kitty/nvim/.zshrc 修改

kitty/dank-tabs.conf

@@ -0,0 +1,23 @@
+tab_bar_edge            top
+tab_bar_style           powerline
+tab_powerline_style     slanted
+tab_bar_align           left
+tab_bar_min_tabs        2
+tab_bar_margin_width    0.0
+tab_bar_margin_height   2.5 1.5
+tab_bar_margin_color    #101418
+
+tab_bar_background              #101418
+
+active_tab_foreground           #000000
+active_tab_background           #42a5f5
+active_tab_font_style           bold
+
+inactive_tab_foreground         #c2c7cf
+inactive_tab_background         #101418
+inactive_tab_font_style         normal
+
+tab_activity_symbol             " ● "
+
+tab_title_template              "{fmt.fg.red}{bell_symbol}{activity_symbol}{fmt.fg.tab}{title[:30]}{title[30:] and '…'} [{index}]"
+active_tab_title_template       "{fmt.fg.red}{bell_symbol}{activity_symbol}{fmt.fg.tab}{title[:30]}{title[30:] and '…'} [{index}]"