Add theme-set/switching logic, and minor nvim, tmux, obsidian changes

src_files/imports/themes-omarchy/gruvbox/brave.theme

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+## original name chromium.theme (under gruvbox theme directory)
+## author: David Heinemeier Hansson
+## copyright: David Heinemeier Hansson
+## license: MIT
+## upstream: https://github.com/basecamp/omarchy/blob/master/themes/gruvbox/chromium.theme
+
+# # This file is copied from a theme from Omarchy (https://github.com/basecamp/omarchy).
+# Licensed under the MIT License. See the original LICENSE file for details at:
+# https://github.com/basecamp/omarchy/blob/master/LICENSE
+
+##########################################################################################
+
+40,40,40

src_files/imports/themes-omarchy/gruvbox/hyprland.conf

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+## name hyprland.conf (under gruvbox theme directory)
+## author: David Heinemeier Hansson
+## copyright: David Heinemeier Hansson
+## license: MIT
+## upstream: https://github.com/basecamp/omarchy/blob/master/themes/gruvbox/hyprland.conf
+
+# # This file is copied from a theme from Omarchy (https://github.com/basecamp/omarchy).
+# Licensed under the MIT License. See the original LICENSE file for details at:
+# https://github.com/basecamp/omarchy/blob/master/LICENSE
+
+##########################################################################################
+
+$activeBorderColor = rgb(a89984)
+
+general {
+    col.active_border = $activeBorderColor
+}
+
+group {
+    col.border_active = $activeBorderColor
+}

src_files/imports/themes-omarchy/gruvbox/hyprlock.conf

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+## name hyprlock.conf (under gruvbox theme directory)
+## authors: David Heinemeier Hansson, Naparajith T L (github: DrInfinite)
+## copyright: David Heinemeier Hansson
+## license: MIT
+## upstream: https://github.com/basecamp/omarchy/blob/master/themes/gruvbox/hyprlock.conf
+
+# # This file is copied from a theme from Omarchy (https://github.com/basecamp/omarchy).
+# Licensed under the MIT License. See the original LICENSE file for details at:
+# https://github.com/basecamp/omarchy/blob/master/LICENSE
+
+##########################################################################################
+
+$color = rgba(40,40,40,1.0)
+$inner_color = rgba(40,40,40,0.8)
+$outer_color = rgba(212,190,152,1.0)
+$font_color = rgba(212,190,152,1.0)
+$check_color = rgba(214, 153, 92, 1.0)

src_files/imports/themes-omarchy/gruvbox/kitty.conf

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+## name: Gruvbox Dark
+## author: Pavel Pertsev
+## license: MIT/X11
+## upstream: https://raw.githubusercontent.com/gruvbox-community/gruvbox-contrib/master/kitty/gruvbox-dark.conf
+
+##########################################################################################
+
+selection_foreground    #ebdbb2
+selection_background    #d65d0e
+
+background              #282828
+foreground              #ebdbb2
+
+color0                  #3c3836
+color1                  #cc241d
+color2                  #98971a
+color3                  #d79921
+color4                  #458588
+color5                  #b16286
+color6                  #689d6a
+color7                  #a89984
+color8                  #928374
+color9                  #fb4934
+color10                 #b8bb26
+color11                 #fabd2f
+color12                 #83a598
+color13                 #d3869b
+color14                 #8ec07c
+color15                 #fbf1c7
+
+cursor                  #bdae93
+cursor_text_color       #665c54
+
+url_color               #458588
+
+# START_AUTOGENERATED_TAB_STYLE
+# Feel free to update these colors manually and remove these comments.
+active_tab_foreground   #eeeeee
+active_tab_background   #d65d0e
+inactive_tab_foreground #ebdbb2
+inactive_tab_background #202020
+# END_AUTOGENERATED_TAB_STYLE

src_files/imports/themes-omarchy/gruvbox/waybar.css

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+/*
+  name hyprlock.conf (under gruvbox theme directory)
+  authors: David Heinemeier Hansson, Naparajith T L (github: DrInfinite), and Ryan Hughes
+  copyright: David Heinemeier Hansson
+  license: MIT
+  upstream: https://github.com/basecamp/omarchy/blob/master/themes/gruvbox/waybar.css
+
+  This file is copied from a theme from Omarchy (https://github.com/basecamp/omarchy).
+  Licensed under the MIT License. See the original LICENSE file for details at:
+  https://github.com/basecamp/omarchy/blob/master/LICENSE
+*/
+
+@define-color foreground #d4be98;
+@define-color background #282828;