feat: add more configurations and a new theme

- a theme based on carbon and vim high contrast
- modify layouts in zellij and add support for swaps
- add snippets

Signed-off-by: Avinal Kumar <avinal.xlvii@gmail.com>

themes/palettes/space_carbon.sh

@@ -0,0 +1,61 @@
+# space_carbon - high-contrast theme
+# Inspired by vim_dark_high_contrast + IBM Carbon
+
+THEME_NAME="space_carbon"
+HELIX_THEME="space_carbon"
+
+# Base
+BG="#000000"
+FG="#c1c9d2"
+CURSOR="#c1c9d2"
+SELECTION_BG="#393939"
+SELECTION_FG="#ffffff"
+
+# Normal colors
+BLACK="#000000"
+RED="#ed5f74"
+GREEN="#1ea672"
+YELLOW="#d97917"
+BLUE="#688ef1"
+MAGENTA="#c96ed0"
+CYAN="#3a97d4"
+WHITE="#e3e8ee"
+
+# Bright colors
+BRIGHT_BLACK="#697386"
+BRIGHT_RED="#fbb5b2"
+BRIGHT_GREEN="#85d996"
+BRIGHT_YELLOW="#efc078"
+BRIGHT_BLUE="#9fcdff"
+BRIGHT_MAGENTA="#f0b4e4"
+BRIGHT_CYAN="#7fd3ed"
+BRIGHT_WHITE="#ffffff"
+
+# Dark/muted variants (for backgrounds, subtle highlights)
+DARK_RED="#3d1a22"
+DARK_GREEN="#0d3326"
+DARK_YELLOW="#332200"
+DARK_BLUE="#1a2744"
+DARK_MAGENTA="#602864"
+DARK_CYAN="#0f2d44"
+DARK_WHITE="#393939"
+
+# Gray scale (Carbon-inspired layering)
+BG1="#0c0c0c"
+BG2="#161616"
+BG3="#262626"
+BG4="#393939"
+
+# Additional accents
+ORANGE="#e87b35"
+PINK="#ff7eb6"
+TEAL="#08bdba"
+
+# Semantic
+ACCENT="$CYAN"
+SUCCESS="$GREEN"
+WARNING="$YELLOW"
+ERROR="$RED"
+INFO="$BLUE"
+MUTED="$BRIGHT_BLACK"
+SURFACE="$DARK_WHITE"