resolve warnings in emacs 29

[takaxp]

In org-tree-slide-move-next-tree:
org-tree-slide.el:369:21: Warning: ‘point-at-bol’ is an obsolete function
(as of 29.1); use ‘line-beginning-position’ or ‘pos-bol’ instead.

In org-tree-slide--stop:
org-tree-slide.el:583:4: Warning: ‘org-show-siblings’ is an obsolete
function (as of 9.6); use ‘org-fold-show-siblings’ instead.

In org-tree-slide--display-tree-with-narrow:
org-tree-slide.el:610:15: Warning: ‘point-at-bol’ is an obsolete function
(as of 29.1); use ‘line-beginning-position’ or ‘pos-bol’ instead.
org-tree-slide.el:613:6: Warning: ‘org-show-entry’ is an obsolete function
(as of 9.6); use ‘org-fold-show-entry’ instead.

In org-tree-slide--first-heading-with-narrow-p:
org-tree-slide.el:944:32: Warning: ‘point-at-bol’ is an obsolete function
(as of 29.1); use ‘line-beginning-position’ or ‘pos-bol’ instead.

In outline-show-children:
org-tree-slide-compt.el:20:9: Warning: ‘outline-view-change-hook’ is an
obsolete variable (as of 29.1).

[takaxp]

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

[ed9w2in6]

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’.