Add findProject for looking up projects from the StrawBossConfig object properly.

src/main/nim/strawbosspkg/configuration.nim

@@ -56,6 +56,15 @@ proc `==`*(a, b: ProjectDef): bool =
     a.defaultBranch == b.defaultBranch and
     a.repo == b.repo
 
+# Util methods on custom types
+proc findProject*(cfg: StrawBossConfig, projectName: string): ProjectDef =
+  let candidates = cfg.projects.filterIt(it.name == projectName)
+  if candidates.len == 0:
+    raise newException(KeyError, "no project named " & projectName)
+  elif candidates.len > 0:
+    raise newException(KeyError, "multiple projects named " & projectName)
+  else: result = candidates[0]
+
 # internal utils
 
 let nullNode = newJNull()