Separate Lupine's green from its yellow

Both slots held #026fde, so strings and numbers rendered in one color
and syntax highlighting lost the distinction entirely. It mattered less
when the theme shipped its own nvim and vscode files; now that both
generate from this palette, the collision is visible everywhere.

The green slot takes a violet. Lupine's hues sit at 210, 214, 224, 267
and 301, leaving one real gap between blue and magenta, and that gap is
the only place a new color fits without either crowding an existing hue
or breaking the blues-and-purples character. Its bright variant becomes
a lavender, which suits a theme named for the flower. Nothing here reads
as green; the slot keeps its ANSI name, not its usual hue.

Yellow, orange and cyan remain close to each other. Pulling those apart
means either warm hues or a wider spread than the theme allows, which is
a bigger change than this one.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018CC9kSQv8ZEogaxDoeKBzL

themes/lupine/colors.toml

@@ -17,7 +17,7 @@ bright_foreground = "#000000"
 red = "#c900c4"
 yellow = "#026fde"
 orange = "#026fde"
-green = "#026fde"
+green = "#4a2fd0"
 cyan = "#0c67de"
 blue = "#3264eb"
 magenta = "#8a4ad7"
@@ -25,7 +25,7 @@ brown = "#013a6f"
 
 bright_red = "#f930fb"
 bright_yellow = "#358fff"
-bright_green = "#358fff"
+bright_green = "#9f85e0"
 bright_cyan = "#3986ff"
 bright_blue = "#5482ff"
 bright_magenta = "#b363ff"