feat: enhance system information logging format and include additional env and RAM details (#3839)

When we introduced the system information, I selected `###` as the
prefix for each line. While this doesn't cause any problems in the
terminal, when someone copies the output to an issue or the forum, every
line is formatted as a heading, which is not ideal. That's why I made
some rework and suggest these changes.

In addition to the formatting changes, I added some env and RAM details
plus the uptime. These are just suggestions – if you don't think they're
worth adding, I'm happy to remove them. We wanted to keep this block
compact.

@sdetweil, since you are often on the front line with the error messages
from users: Is there any information missing in the system block that
you often have to request additionally?

Feel free to request changes!

-----

## in the terminal

### before

```
[2025-07-09 21:58:36.943] [INFO]  System information:
### SYSTEM:   manufacturer: Notebook; model: N650DU; virtual: false
### OS:       platform: linux; distro: Debian GNU/Linux; release: 12; arch: x64; kernel: 5.10.0-20-amd64
### VERSIONS: electron: 36.3.2; used node: 24.2.0; installed node: 24.2.0; npm: 10.9.0; pm2: 6.0.6
### OTHER:    timeZone: Europe/Berlin; ELECTRON_ENABLE_GPU: undefined 
```

-----

### after

```
[2025-07-09 21:57:47.604] [INFO]  
#####  System Information  #####
- SYSTEM:    manufacturer: Notebook; model: N650DU; virtual: false; timeZone: Europe/Berlin
- OS:        platform: linux; distro: Debian GNU/Linux; release: 12; arch: x64; kernel: 5.10.0-20-amd64
- VERSIONS:  electron: 36.3.2; used node: 24.2.0; installed node: 24.2.0; npm: 10.9.0; pm2: 6.0.6
- ENV:       XDG_SESSION_TYPE: wayland; MM_CONFIG_FILE: undefined;
             WAYLAND_DISPLAY:  wayland-0; DISPLAY: :0; ELECTRON_ENABLE_GPU: undefined
- RAM:       total: 15925.45 MB; free: 967.75 MB; used: 14957.70 MB
- UPTIME:    172 minutes 
```

-----

## as markdown (in an issue or the forum)

### before

[2025-07-09 21:58:36.943] [INFO]  System information:
### SYSTEM:   manufacturer: Notebook; model: N650DU; virtual: false
### OS: platform: linux; distro: Debian GNU/Linux; release: 12; arch:
x64; kernel: 5.10.0-20-amd64
### VERSIONS: electron: 36.3.2; used node: 24.2.0; installed node:
24.2.0; npm: 10.9.0; pm2: 6.0.6
### OTHER:    timeZone: Europe/Berlin; ELECTRON_ENABLE_GPU: undefined 

-----

### after

[2025-07-09 21:57:47.604] [INFO]  
#####  System Information  #####
- SYSTEM: manufacturer: Notebook; model: N650DU; virtual: false;
timeZone: Europe/Berlin
- OS: platform: linux; distro: Debian GNU/Linux; release: 12; arch: x64;
kernel: 5.10.0-20-amd64
- VERSIONS: electron: 36.3.2; used node: 24.2.0; installed node: 24.2.0;
npm: 10.9.0; pm2: 6.0.6
- ENV:       XDG_SESSION_TYPE: wayland; MM_CONFIG_FILE: undefined;
WAYLAND_DISPLAY: wayland-0; DISPLAY: :0; ELECTRON_ENABLE_GPU: undefined
- RAM:       total: 15925.45 MB; free: 967.75 MB; used: 14957.70 MB
- UPTIME:    172 minutes

CHANGELOG.md

@@ -16,6 +16,7 @@ Thanks to: @dathbe.
 ### Changed
 
 - [clock] Add CSS to prevent line breaking of sunset/sunrise time display (#3816)
+- [core] Enhance system information logging format and include additional env and RAM details
 
 ### Updated