Add Heatmaps to UI

Add Heatmap analysis to website as well as a basic UI for viewing the Heatmaps.
There are still issues, like some players not getting a heatmap assigned and heatmaps including data
from warmup etc.

backend/Cargo.toml

@@ -26,6 +26,9 @@ reqwest = { version = "0.12", features = ["json"] }
 common = { path = "../common/" }
 analysis = { path = "../analysis/" }
 
+image = { version = "0.25" }
+base64 = { version = "0.22" }
+
 csdemo = { package = "csdemo", git = "https://github.com/Lol3rrr/csdemo.git", ref = "main" }
 memmap2 = { version = "0.9" }
 clap = { version = "4.5", features = ["derive"] }