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/Erlang/run_1.tsv

@@ -1,6 +1,6 @@
-12   2048 0
-36   2048 0
-60   2048 0
-84   2048 0
-108   2048 0
-132 0 0
+11   1984 0
+35   2096 0
+60   2096 0
+84   2096 0
+109   2096 0
+132   2096 

timelines/Erlang/run_2.tsv

@@ -1,10 +1,6 @@
-8   2032 0
-33   2032 0
-56   2032 0
-79   2032 0
-102   2032 0
-128   2032 0
-151   2032 0
-177   2032 0
-206   2032 0
-227   2032 0
+8   2064 0
+32   2064 0
+55   2064 0
+79   2064 0
+101   2064 0
+125   2064 

timelines/Erlang/run_3.tsv

@@ -0,0 +1,6 @@
+7   2064 0
+32   2064 0
+56   2064 0
+78   2064 0
+102   2064 0
+120 0 0

timelines/Erlang/run_4.tsv

@@ -0,0 +1,6 @@
+8   2048 0
+33   2064 0
+55   2064 0
+79   2064 0
+101   2064 0
+122   2064 0