Add extra nushell solution for 2022 day 01 part 1

Can't be bothered to add part 2,
because that would require recompiling
nushell to get dataframes back.

2022/day-03/extra/part_one.nu

@@ -0,0 +1,42 @@
+def is-downcase? [] {
+    find --regex '[A-Z]' | is-empty
+}
+
+def item-priority [item: string] {
+    let val = ($item | into int -r 36) - 9
+
+    if ($item | is-downcase?) {
+        $val
+    } else {
+        $val + 26
+    }
+}
+
+def main [path = "../inputs/puzzle.txt"] {
+    open $path
+    | lines
+    | each {
+        let chars = split chars
+        let len = ($chars | length)
+        let mid = ($len / 2)
+
+        let df = ($chars | into df)
+        let left = ($df | slice 0 $mid)
+        let right = ($df | slice $mid $len)
+
+        let df = ($left | rename "0" "left" | with-column $right --name "right")
+        let mask = ($df.left | is-in $df.right)
+
+        $left
+        | rename "0" "left"
+        | with-column $right --name "right"
+        | get "left"
+        | filter-with $mask
+        | unique
+        | into nu
+        | get "left"
+        | each { |i| item-priority $i }
+        | math sum
+    }
+    | math sum
+}