All changes:
* Include `file.pack_libraries` and `file.unpack_libraries` to the menu
[1].
* Rename "Pack Blender Libraries" → "Pack Linked Libraries" [2].
* Rename "Unpack Blender Libraries" → "Unpack Linked Libraries" [2].
* Rename "Pack All Into .blend" → "Pack Resources" [3]
* Rename "Unpack All Into Files" → "Unpack Resources" [3]
* Rename "☑ Automatically Pack Into .blend" → "☑ Automatically Pack
Resources" [3]
* Rename "Make All Paths Relative" → "Make Paths Relative" [4]
* Rename "Make All Paths Absolute" → "Make Paths Absolute" [4]
* Add separators accordingly
---
[1] - This was never exposed since its original commit rB16411da41e40.
Now that operator not listed in menus don't
show up in the search, this became even more hidden.
[2] - The original name (Pack Blender Library) was not clear enough.
Pose Libraries and Asset Libraries are also technically Blender
libraries.
[3] - The term All was misleading since it didn't include the Linked
Libraries.
[4] - No need to use "All". It is not used in the Report/Find Missing
Files either.
This commit put this in the File > External Data menu.
Differential Revision: https://developer.blender.org/D11109
ee51e73355