refactor(themes): change `solarized_*` ruler to `bg`

Also changed the colors to better blend with the theme.

runtime/themes/solarized_dark.toml

@@ -90,7 +90,7 @@
 "ui.selection.primary" = { bg = "base015" }
 
 "ui.virtual.indent-guide" = { fg = "base02" }
-"ui.virtual.ruler" = { fg = "red" }
+"ui.virtual.ruler" = { bg = "base02" }
 
 # normal模式的光标
 "ui.cursor" = {fg = "base02", bg = "cyan"}

runtime/themes/solarized_light.toml

@@ -104,7 +104,7 @@
 "ui.selection.primary" = { bg = "base015" }
 
 "ui.virtual.indent-guide" = { fg = "base02" }
-"ui.virtual.ruler" = { fg = "red" }
+"ui.virtual.ruler" = { bg = "base02" }
 
 # normal模式的光标
 # normal mode cursor