fix: Improve error handling in `mkdir` function (logseq#9247)

* Improve error handling in `mkdir-if-not-exists` function
This PR improves the error handling in the `mkdir-if-not-exists` function by logging the "EEXIST" error (which indicates the directory already exists) instead of throwing it. Other errors will continue to be handled as before.
- [x] closes logseq#9182

* enhance: move error handling to fs/node.js

* fix: make EEXIST silent and only throw other errors

tiny style fix: polish color circles in block context menu (logseq#9237)

* style: adapt bullet context menu color circles to theme highlight colors

* style: remove shadows for color circles in block context menu

* Revert "style: adapt bullet context menu color circles to theme highlight colors"

This reverts commit 6468115.

fix(editor): wrong xml prettify implementation

Introduced: logseq#8968

fix: whiteboard breadcrumb

chore: release 0.9.1

fix(ui): incorrect login entry from the settings pane

chore(release): bump version 0.8.18

fix(mobile): do not use newer regex flags

chore: bump version 0.8.16

fix: set default http server host to 127.0.0.1