content: usage: fix broken internal links

Author: ES-Alexander

content/usage/advanced/index.md

@@ -162,7 +162,7 @@ is wide enough, the sidebar automatically stays open.
 
 - The theme content at the top [is configurable](#theme-content)
 {% pirate() %}
-- [The development documentation](../development/extensions/#web-interface-http-server)
+- [The development documentation](@/development/extensions/index.md#web-interface-http-server)
 specifies the requirements for a service page to appear in the sidebar
 {% end %}
 
@@ -286,7 +286,7 @@ and where relevant
 - its API documentation (in a live-testable form)
 - the current API version
 
-The individual services are documented [in the development documentation](../development/core/#services).
+The individual services are documented [in the development documentation](@/development/core/index.md#services).
 {% end %}
 {{ easy_image(src="available-services", width=600, class="pirate") }}
 
@@ -319,7 +319,7 @@ versions
    - Previously-installed versions are kept locally on the device, unless
    manually deleted, which provides an easy route for roll-backs to undesired
    changes (e.g. during development)
-- Allows updating the [bootstrap image](../development/bootstrap) to match the current version
+- Allows updating the [bootstrap image](@/development/bootstrap/index.md) to match the current version
 - Allows loading remote versions (including from custom docker-hub repositories)
 - Allows manually uploading docker images from the surface computer
 - If an undetected failure somehow occurs in BlueOS (or if a broken version gets
@@ -657,7 +657,7 @@ it automatically (via MAVLink)
 {{ service(service="Kraken", port=9134, link="/services/kraken", based=true) }}
 
 The Extensions Manager is in charge of fetching, installing, updating, and managing
-[Extensions](../extensions).
+[Extensions](@/development/extensions/index.md).
 
 The Store tab shows the available extensions, with a default filter which excludes
 the development example extensions.

content/usage/overview/index.md

@@ -97,7 +97,7 @@ BlueOS has almost all features from the old Companion, and several hotly-request
 | [**Ping Sonar Devices**](../advanced/#ping-sonar-devices) | &rarr; | &rarr; | &rarr;<br>+ Detects Ping360 in ethernet configuration<br>+ Ping Sonar distance estimates can be *sent via MAVLink* | &rarr;<br>+ Devices can be *hot-plugged*<br><br>- *No MAVLink pipeline* | Ping Sonar and Ping360 can connect with [Ping Viewer](https://docs.bluerobotics.com/ping-viewer/)<br>+ Ping Sonar distance estimates can be *sent via MAVLink* |
 | [**Serial Bridges**](../advanced/#serial-bridges) | &rarr;<br>+ Separate target and listener ports | &rarr; | &rarr; | &rarr; | Create and manage bridges between serial and UDP/TCP endpoints |
 | **Water Linked** | &rarr; | &rarr; | DVL-A50 and UGPS extensions available through Extensions Manager | [DVL-A50 package available](https://discuss.bluerobotics.com/t/external-integrations-extensions/10912#integration-example-dvl-5) | Supports UGPS and DVL-A50 |
-| [**Extensions**](../extensions/) | &rarr; | &rarr; | Custom extensions available through Extensions Manager | &rarr; | Custom functionality requires forking the codebase |
+| [**Extensions**](@/development/extensions/index.md) | &rarr; | &rarr; | Custom extensions available through Extensions Manager | &rarr; | Custom functionality requires forking the codebase |
 
 ## Release Types
 BlueOS has multiple release types, to allow choosing your preferred balance between access to the latest fixes and improvements, and stability of the software. The three release types are: