Print loaded files and errors, enable loading and searching

src/transcript_browser/_main.cpp

@@ -40,7 +40,7 @@ Array<TimeString> ParseSrtFile(Arena *arena, String filename) {
     for (int i = 0; i < lines.len;) {
         String it0 = lines[i++];
         long   num = strtol(it0.data, NULL, 10);
-        Assert(section_number == num);
+        Assert(section_number == num); // @todo: error
         section_number += 1;
 
         TimeString item = {};