fix(theme): update background color for tree views

Updated the background color for NvimTree and NeoTree views to use
`colors.none` instead of `colors.active`. This change ensures a more
consistent appearance across different themes and configurations.

lua/aurora/theme.lua

@@ -732,7 +732,7 @@ function theme.highlights(colors, config)
       NvimTreeOpenedFile = { fg = colors.none },
       NvimTreeSpecialFile = { fg = colors.orange, style = "underline" },
       NvimTreeImageFile = { fg = colors.purple, style = "bold" },
-      NvimTreeNormal = { fg = colors.fg, bg = colors.active },
+      NvimTreeNormal = { fg = colors.fg, bg = colors.none },
       NvimTreeCursorLine = { link = "Visual" },
       NvimTreeVertSplit = { fg = colors.active, bg = colors.active },
       LspDiagnosticsError = { fg = colors.error },
@@ -753,8 +753,8 @@ function theme.highlights(colors, config)
       NeoTreeGitConflict = { fg = colors.red },
       NeoTreeGitModified = { fg = colors.yellow },
       NeoTreeGitUntracked = { fg = colors.green },
-      NeoTreeNormal = { fg = colors.fg, bg = colors.active },
-      NeoTreeNormalNC = { fg = colors.fg, bg = colors.active },
+      NeoTreeNormal = { fg = colors.fg, bg = colors.none },
+      NeoTreeNormalNC = { fg = colors.fg, bg = colors.none },
       NeoTreeSymbolicLinkTarget = { fg = colors.cyan, style = "bold" },
       NeoTreeCursorLine = { link = "Visual" },