Guides gone, and no functionality to replace it.
I do a lot of youtube videos, and export guides as chapters.
Up until recently, I would just scroll to the part in the video that I would like to mark a new chapter, and hit "G" and then type in the name of the chapter as the guide label.
With this method, I could quickly pick out the chapters, and then by exporting the guides to the clipboard, and Ctrl+V in the youtube video I would have my chapters.
It was a very nice time-saving feature.
I read through some of the commits here, and it seems that all the guides have now been replaced with Markers.
However, I seem to be unable to add a marker to the timeline.
When I select Add marker, I get an error message that there is no clip selected.
If I click on "Master" and select add marker, I still get the same error message.
Tried locking and unlocking markers on the timeline.
What is the proper way to re-create the functionality of guides now, please?
About my system:
```
/ \ -----------
/ \ OS: Arch Linux x86_64
/ \ Host: ROG Strix G733PYV_G733PYV (1.0)
/ ,, \ Kernel: Linux 6.17.4-4-cachyos
/ | | \ Uptime: 28 mins
/_-'' ''-_\ Packages: 1724 (pacman), 7 (flatpak)
Shell: fish 4.1.2
Display (NE173QHM-NZ2): 2560x1440 @ 1.33x in 17", 240 Hz [Built-in]
Display (BenQ EX3210U): 3840x2160 @ 1.5x in 32", 120 Hz [External] *
DE: KDE Plasma 6.4.5
WM: KWin (Wayland)
WM Theme: Oxygen
Theme: Oxygen (Oxygen) [Qt], Breeze [GTK2/3/4]
Icons: oxygen [Qt], oxygen [GTK2/3/4]
Font: Noto Sans (10pt) [Qt], Noto Sans (10pt) [GTK2/3/4]
Cursor: Oxygen-22-White-Valentine (48px)
Terminal: konsole 25.8.2
Terminal Font: Hack (12pt)
CPU: AMD Ryzen 9 7945HX3D (32) @ 5.46 GHz
GPU 1: AMD Radeon 610M [Integrated]
GPU 2: NVIDIA GeForce RTX 4090 Laptop GPU [Discrete]
Memory: 9.63 GiB / 62.00 GiB (16%)
Swap: 0 B / 100.00 GiB (0%)
Disk (/): 120.69 GiB / 150.00 GiB (80%) - btrfs
Disk (/home): 2.76 TiB / 3.40 TiB (81%) - btrfs
Disk (/home/evert/Videos): 2.73 TiB / 3.39 TiB (81%) - btrfs
Local IP (enp7s0u2u2c2): 192.168.88.88/24
Battery (GA50358): 65% [AC Connected]
Locale: en_GB.UTF-8
```
issue