* feat: basic use of code block by prism
* opti: remove codemirror from muya
* feat: add highlight to math and frontmatter
* feat: import and export in math block, html block, frontmatter, code block
* update: paragraph ctrl
* feat: copy and paste in new math block and html block
* feat: update code block style in dark theme
* feat: search and replace in code block
* fix: update menu item status when selection changed
* opti: optimization of updateCtrl divide it into clickCtrl and inputCtrl
* opti: search and replace in code block when no lang selected
* opti: copy paste in code block
* feat: insert paragraph before or after code block
* opti: change emoji.js to emoji.json
* feat: auto indent in code block
* opti: auto indent in code block
* opti: remove the use of snabbdom-virtualize
* fix: do not show format float box in code block
* opti: emoji picker
* update: delete some unused codes
* update: electron
* use a temp prismjs2 instead of prismjs
* feature: Add experiment RTL support
* fix: binding to currentfile textdirection
* feature: add sourcecode RTL support
* feature: add text direction menu upgrade
* fix sourceCode does't change from menu switch text direction
* rewrite notice module
* optimization: show some notification when export html or pdf
* optimization: style of open project button
* little bug fix
* style: uniform titlebar hight to remove some style error
* side-bar-view
* list files view
* update the structure of store, add modules
* open project and change select files
* add tabs view
* listen for file/dir changing, and update in sidebar
* delete some unused code
* context menu in sidebar
* add tool bar and tab bar menu item
* save all and save all and close
* copy, cut, paste, new file, new directory, move to trash, open in folder
* rename in sidebar
