wivrn: emphasize alternative options

content/docs/fossvr/wivrn/_index.md

@@ -102,7 +102,7 @@ Manual steps: See the [README](https://github.com/WiVRn/WiVRn/blob/master/README
 
 To use SlimeVR trackers through WiVRn, you currently must use a [fork](https://github.com/notpeelz/WiVRn) of WiVRn:
 
-### Usage with Envision
+### Option A: Build with Envision
 
 To use this fork within Envision, edit these fields in your profile:
 - XR Service Repo: `https://github.com/notpeelz/WiVRn.git`
@@ -111,7 +111,7 @@ To use this fork within Envision, edit these fields in your profile:
 
 Then save and clean build the profile.
 
-### NixOS setup
+### Option B: NixOS
 Override the `wivrn` package from nixpkgs with something resembling the following, replacing `[COMMIT HASH HERE]` with the latest commit hash from https://github.com/notpeelz/WiVRn/commits/solarxr-patches and filling in the correct src hash. Do note you may need to adapt this depending on how you install WiVRn:
 ```nix
 { pkgs, lib, ... }:
@@ -145,7 +145,7 @@ You must have SteamVR installed (no need to run it).
 
 Upstream xrizer doesn't support FBT, so either **select OpenComposite as the OpenVR library** in WiVRn dashboard settings, or build the [experimental2 branch of xrizer](https://github.com/RinLovesYou/xrizer/tree/experimental2).
 
-### Using Distro-Native Packages
+### Option A: Use Distro-Native Packages
 
 These packages come with lighthouse support enabled (Flatpak & Envision does NOT)
 - Arch: Install `wivrn-dashboard wivrn-server` from AUR
@@ -156,7 +156,7 @@ Open the WiVRn dashboard and under advanced settings, tick `Enable SteamVR track
 
 Warning: distro-native packages are known to have issues with Flatpak Steam.
 
-### Envision
+### Option B: Build using Envision
 Set WiVRn Profile as such:
 - XR Service CMake Flags:
   - `WIVRN_FEATURE_STEAMVR_LIGHTHOUSE=ON`
@@ -166,7 +166,7 @@ Set WiVRn Profile as such:
 
 Perform a **Clean Build** after changing the CMake flags!
 
-### NixOS
+### Option C: NixOS
 Override the `wivrn` package and launch wivrn-server with the required environment variables:
 ```nix
 {
@@ -186,7 +186,7 @@ Override the `wivrn` package and launch wivrn-server with the required environme
 }
 ```
 
-### Manual
+### Option D: Manual Build
 Simply pass `-DWIVRN_FEATURE_STEAMVR_LIGHTHOUSE=ON` to CMake and export the above environment variables before starting `wivrn-server`.
 
 ### Usage tips