fix(editor): set search-match foreground color on find highlights

Find-in-file matches showed yellow background with the editor's green
syntax text underneath, making hits unreadable. Give .cm-openidea-findMatch
and .cm-openidea-findMatch-current the per-theme --fg-search-match color,
matching how .match rules elsewhere already set it.

Fixes #1733

src/editor/core/cm/theme.ts

@@ -18,6 +18,7 @@ export const findLocals = {
 export const findStyles = {
   ".cm-openidea-findMatch": {
     backgroundColor: "var(--editor-search)",
+    color: "var(--fg-search-match, inherit)",
     borderRadius: "2px",
   },
   ".cm-openidea-findExcluded": {
@@ -29,6 +30,7 @@ export const findStyles = {
   },
   ".cm-openidea-findMatch-current": {
     backgroundColor: "var(--editor-search-current)",
+    color: "var(--fg-search-match, inherit)",
     outline: "1px solid color-mix(in srgb, var(--editor-search-current) 60%, var(--fg-strong))",
   },
 };