Add resource usage timeline diagrams to README

- Added Mermaid XY charts showing memory usage over time
- Individual charts for Elixir, TypeScript, Dart, Haskell, C
- Comparison chart for fast languages
- Shows how memory usage varies during program execution
- Based on actual timeline data from benchmark runs

timelines/Scala/run_1.tsv

@@ -0,0 +1,32 @@
+9   1968 0
+33   2048 0
+58   2048 0
+80   2048 0
+103   2048 0
+126   2048 0
+150   2048 0
+175   2048 0
+198   2048 0
+222   2048 0
+243   2048 0
+265   2048 0
+289   2048 0
+312   2048 0
+336   2048 0
+360   2048 0
+383   2048 0
+407   2048 0
+432   2048 0
+456   2048 0
+479   2048 0
+503   2048 0
+526   2048 0
+567   2048 0
+595   2048 0
+622   2048 0
+647   2048 0
+671   2048 0
+695   2048 0
+723   2048 0
+746   2048 0
+777   2048 0