feat: add a web UI server (#1345)

* update rdagent cmd

* fix log error message

* use multiProcessing.Process instead of subprocess.Popen

* add traces to gitignore

* add user interactor in RDLoop (finance scenarios)

* add interactor (feedback, hypothesis) for quant scens

* fix the test_end in qlib conf

* add features init config, general instruction to qlib scenarios

* set base features for based exp

* fix bug when combine factors

* move traces folder to git_ignore_folder

* fix bug in features init

* fix quant interact bug

* fix logger warning error

* bug fixes

* modify rdagent logger, now it can set file output

* adjust cli functions and fix logger bug

* fix server port transport problem

* update server_ui in cli

* add web code

* fix CI problem

* black fix

* update web ui README

* update README

* update readme

web/src/components/loading-dot.vue

@@ -0,0 +1,23 @@
+<template>
+  <span class="spinner"></span>
+</template>
+
+<style scoped lang="scss">
+.spinner {
+  display: inline-block;
+  height: 35px;
+  width: 35px;
+  margin-top: 3px;
+  //   background: rgba(0, 0, 0, 0.2);
+  border-radius: 50%;
+  border-top: 2px solid #fff;
+  border-right: 2px solid transparent;
+  animation: spinner6 700ms linear infinite;
+}
+
+@keyframes spinner6 {
+  to {
+    transform: rotate(360deg);
+  }
+}
+</style>