* backend of add_scalars

* fix function name bug of get_scalars_tags

* @zh794390558 and @ShenYuhan commented 0508

* fix a bug

* adapt to frontend runs need

* fix proto

* fix a bug

* add scalars test demo

* fix

* adapt scalars to scalar

* remove unused code

* fix demo code

* fix proto version

* fix proto version

* upgrade protoc to v3.19.0

* fix a bug in logreader
Co-authored-by: N伽利略 <jialiasus2@163.com>
Co-authored-by: Nwuzewu <wuzewu@baidu.com>

* add available component tab control

* fix string format

* integrate x2paddle tool

* fix caffe convertion bug

* add post support

* fix tar file path

* add download api

* add tips for users

* chore: fix typo

* chore: update dependencies

* fix: error when same tags in one chart in scalar page

* fix: error when data length changed in scalar page

* fix: minor bugs fix

* bump visualdl to 2.2.1

* fix bad url

* add add_figure for LogWriter

* format code

* update date
Co-authored-by: ShenYuhan <yhan_shen@163.com>

Co-authored-by: NPeter Pan <littlepanzh@gmail.com>

Co-authored-by: NPeter Pan <littlepanzh@gmail.com>

* style: add python lint & pre-commit

* style: use pre-commit to lint fe codes

* fix: show raw shape of tensor in high-dimensional chart

* feat: implement random sampling in high-dimensional chart

* feat: add fog in scatter chart

* feat: focus hovered point in high-dimensional chart

* chore: hide unfulfilled features

* chore: update dependencies

* fix: fix lost import

* style: fix style lint

* chore: fix typo

* bump 2.1.0