Add log level change notification to ULSP

Author: nshapiro4

uni/ulsp/logger.icn

@@ -321,6 +321,10 @@ class Logger(
    method debug_level_kind(lvl, kind, msgs[])
       self._debug(lvl+8, kind, msgs)
    end
+   
+   method set_log_level(newLevel)
+      current_log_level := newLevel
+   end
 
    initially(init_log_level, log_file_path, no_singleton)
       local f

uni/ulsp/server.icn

@@ -81,6 +81,7 @@ class Server(
          "textDocument/didClose" : didClose(params)
          "textDocument/didChange" : didChange(params)
          "textDocument/didSave" : renewSymbols := 1
+         "ulsp/changeLogLevel" : Logger.set_log_level(params["logLevel"])
          "exit" : stoploop := 1
 
          default: