Fix summary TOC

Newer versions of mdbook does not allow two identical links apparently.
This splits the BMO features into separate pages to avoid breaking this
rule.

```
mdbook build docs/user-guide
2025-10-13 12:11:36 [ERROR] (mdbook::utils): Error: Summary parsing failed for file="/workdir/docs/user-guide/src/SUMMARY.md"
2025-10-13 12:11:36 [ERROR] (mdbook::utils): 	Caused By: Duplicate file in SUMMARY.md: "bmo/features.md"
make: *** [Makefile:51: build] Error 101
```

Signed-off-by: Lennart Jern <[email protected]>

Author: lentzi90

docs/user-guide/src/SUMMARY.md

@@ -11,7 +11,7 @@
    - [Install Baremetal Operator](bmo/install_baremetal_operator.md)
    - [Host State Machine](bmo/state_machine.md)
    - [Supported Hardware](bmo/supported_hardware.md)
-   - [Basic Features](bmo/features.md)
+   - [Basic Features](bmo/basic-features.md)
       - [Provisioning and Deprovisioning](bmo/provisioning.md)
       - [Automated Cleaning](bmo/automated_cleaning.md)
       - [Automatic Secure Boot](bmo/automatic_secure_boot.md)
@@ -23,7 +23,7 @@
       - [RAID Setup](bmo/raid.md)
       - [Rebooting Hosts](bmo/reboot_annotation.md)
       - [Specifying Root Device](bmo/root_device_hints.md)
-   - [Advanced Features](bmo/features.md)
+   - [Advanced Features](bmo/advanced-features.md)
       - [Adopting Externally Provisioned Hosts](bmo/externally_provisioned.md)
       - [Advanced Instance Customization](bmo/advanced_instance_customization.md)
       - [Booting from Live ISO](bmo/live-iso.md)

docs/user-guide/src/bmo/advanced-features.md

@@ -0,0 +1,10 @@
+# Baremetal Operator features
+
+## Advanced features
+
+- [Adopting Externally Provisioned Hosts](./externally_provisioned.md)
+- [Advanced Instance Customization](./advanced_instance_customization.md)
+- [Booting from Live ISO](./live-iso.md)
+- [Detaching Hosts from Provisioner](./detached_annotation.md)
+- [External Inspection](./external_inspection.md)
+- [Reconstructing Host Status](./status_annotation.md)

docs/user-guide/src/bmo/features.md renamed to docs/user-guide/src/bmo/basic-features.md

@@ -12,12 +12,3 @@
 - [RAID Setup](./raid.md)
 - [Rebooting Hosts](./reboot_annotation.md)
 - [Specifying Root Device](./root_device_hints.md)
-
-## Advanced features
-
-- [Adopting Externally Provisioned Hosts](./externally_provisioned.md)
-- [Advanced Instance Customization](./advanced_instance_customization.md)
-- [Booting from Live ISO](./live-iso.md)
-- [Detaching Hosts from Provisioner](./detached_annotation.md)
-- [External Inspection](./external_inspection.md)
-- [Reconstructing Host Status](./status_annotation.md)