render: extract color palette; convert floating labels to enum

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I29c5feb6099fe321e227e0313282f1546a6a6964

src/common.h

@@ -104,12 +104,14 @@ typedef struct {
 } Enemy;
 
 // Floating damage text
+typedef enum { LABEL_NONE = 0, LABEL_DODGE, LABEL_BLOCK, LABEL_CRIT, LABEL_SLAIN, LABEL_PROC } FloatingLabel;
+
 typedef struct {
   int x, y;
   int value;
   int lifetime;  // frames remaining
   int is_critical;
-  char label[8];                 // non-empty -> show label instead of numeric value
+  FloatingLabel label;           // label type instead of string
   StatusEffectType effect_type;  // used to pick color for proc labels
 } FloatingText;