resolve warnings in emacs 29 about org-tree-slide HOT 2 OPEN

FYI, deduplicated Compile-Log outputs when doing byte-compile-file:

1. ‘org-show-entry’ is an obsolete function (as of 9.6); use ‘org-fold-show-entry’ instead.
2. ‘org-show-siblings’ is an obsolete function (as of 9.6); use ‘org-fold-show-siblings’ instead.
3. ‘point-at-bol’ is an obsolete function (as of 29.1); use ‘line-beginning-position’ or ‘pos-bol’ instead.

Regarding 3., for point-at-bol I recommend line-beginning-position since from Emacs 29.1 point-at-bol is just alias for line-beginning-position.
Doing C-h f point-at-bol should show: point-at-bol is an alias for ‘line-beginning-position’ in ‘subr.el’.

from org-tree-slide.

need to check below:

• https://github.com/takaxp/org-mode/blob/main/lisp/org-compat.el
• https://github.com/emacs-compat/compat/blob/main/compat-29.el

from org-tree-slide.