chore: remove unused Alacritty duplicates and dead script

Clean up legacy Alacritty theme files and an unreferenced theme-detection script, and fix README links to existing setup docs.

Made-with: Cursor

assets/alacritty/catppuccin-dark.toml

@@ -1,28 +0,0 @@
-# Catppuccin Mocha (Dark) theme for Alacritty
-[colors.primary]
-background = "0x1e1e2e"  # base
-foreground = "0xcdd6f4"  # text
-
-[colors.cursor]
-text = "0x1e1e2e"  # base
-cursor = "0xf5e0dc"  # rosewater
-
-[colors.normal]
-black = "0x45475a"  # surface1
-red = "0xf38ba8"  # red
-green = "0xa6e3a1"  # green
-yellow = "0xf9e2af"  # yellow
-blue = "0x89b4fa"  # blue
-magenta = "0xf5c2e7"  # pink
-cyan = "0x94e2d5"  # teal
-white = "0xbac2de"  # subtext1
-
-[colors.bright]
-black = "0x585b70"  # surface2
-red = "0xf38ba8"  # red
-green = "0xa6e3a1"  # green
-yellow = "0xf9e2af"  # yellow
-blue = "0x89b4fa"  # blue
-magenta = "0xf5c2e7"  # pink
-cyan = "0x94e2d5"  # teal
-white = "0xa6adc8"  # subtext0

assets/alacritty/catppuccin-light.toml

@@ -1,28 +0,0 @@
-# Catppuccin Latte (Light) theme for Alacritty
-[colors.primary]
-background = "0xeff1f5"  # base
-foreground = "0x4c4f69"  # text
-
-[colors.cursor]
-text = "0xeff1f5"  # base
-cursor = "0xdc8a78"  # rosewater
-
-[colors.normal]
-black = "0x5c5f77"  # surface1
-red = "0xd20f39"  # red
-green = "0x40a02b"  # green
-yellow = "0xdf8e1d"  # yellow
-blue = "0x1e40af"  # blue
-magenta = "0xea76cb"  # pink
-cyan = "0x179299"  # teal
-white = "0xacb0be"  # subtext1
-
-[colors.bright]
-black = "0x6c6f85"  # surface2
-red = "0xd20f39"  # red
-green = "0x40a02b"  # green
-yellow = "0xdf8e1d"  # yellow
-blue = "0x1e40af"  # blue
-magenta = "0xea76cb"  # pink
-cyan = "0x179299"  # teal
-white = "0xbcc0cc"  # subtext0