migrate criterion benchmarks to PLNK

changelog

• benchmarks
  • commit has been removed in favor of examples/benches/commit.rs
  • linalg has been migrated to examples/benches/ as bench_linalg
  • setup has been migrated to examples/benches/ as bench_setup
• read-atomic-ops command has been moved to scripts/parse.nu module
• scripts/plot/bench_commit.py has been made more general and renamed to scripts/plot/plot.py
• scripts/plot/benches.py has been removed because it's not required anymore => plot.py and multi_bar.py are general enough

benches/README.md

-## run the benchmarks
-```shell
-nushell> cargo criterion --output-format verbose --message-format json out> results.ndjson
-```
-
-## add the _trusted setup_ sizes
-```shell
-nushell> cargo run --example bench_setup_size out>> results.ndjson
-```
-
-## plot the results
-```shell
-python scripts/plot/benches.py results.ndjson --bench linalg
-python scripts/plot/benches.py results.ndjson --bench setup
-```
-
 ## atomic operations
 ```nushell
 cargo run --example bench_field_operations -- --nb-measurements 1000
@@ -70,7 +54,7 @@ let linalg = open linalg.ndjson
     | flatten --all label
     | into int n
 
-for it in [
+for graph in [
     [op, title];
 
     ["inverse", "time to inverse an nxn matrix on certain curves"],
@@ -78,12 +62,12 @@ for it in [
     ["mul", "time to multiply two nxn matrices on certain curves"]
 ] {
     python scripts/plot/plot.py ...[
-        --title $it.title
+        --title $graph.title
         --x-label "size"
         --y-label "time (in ms)"
         (
             $linalg
-                | where op == $it.op
+                | where op == $graph.op
                 | rename --column { n: "x", name: "curve", mean: "measurement", stddev: "error" }
                 | group-by curve --to-table
                 | update items { reject curve }
@@ -93,11 +77,7 @@ for it in [
 }
 ```
 
-## oneshot benchmarks
-these are benchmarks that run a single measurement, implemented as _examples_ in
-`examples/benches/`.
-
-### trusted setup
+## trusted setup
 ```nushell
 let degrees = seq 0 13 | each { 2 ** $in }
 cargo run --example bench_setup -- --nb-measurements 10 ...$degrees
@@ -131,7 +111,7 @@ python scripts/plot/plot.py ...[
 ]
 ```
 
-### commit
+## commit
 ```nushell
 let degrees = seq 0 15 | each { 2 ** $in }
 cargo run --example bench_commit -- --nb-measurements 10 ...$degrees