Update documentation (#59)

Update documentation

docs/ulwgl.1.scd

@@ -11,28 +11,50 @@ ulwgl-run - Unified Launcher for Windows Games on Linux
 # OPTIONS
 
 *-h, --help*
-	Show this help message
+	Show this help message.
 
 *--config* <config>
-	Path to TOML configuration file (Requires Python 3.11+)
+	Path to TOML configuration file (Requires Python 3.11+).
 
-	See *ulwgl*(5) for more info and examples
+	See *ulwgl*(5) for more info and examples.
+
+# DESCRIPTION
+
+The Unified Launcher for Windows Games on Linux (ULWGL) was created to make
+Valve's Proton and the Protonfixes project accessible outside the Steam client,
+providing a standardized way for other clients (e.g., Lutris, Heroic Games
+Launcher, Bottles, or Rare) to run games via Proton and configure WINE
+prefixes.
+
+As a result, clients:
+- No longer require Steam or Steam binaries to be installed
+- Can contribute and benefit from Protonfixes
+- Can run games through Proton as it were a native Steam game
+- Can reference a unified online database of game fixes (Protonfixes)
+
+You can run ULWGL directly from a terminal emulator, or through your launcher of 
+choice if supported.
 
 # EXAMPLES
 
+*Example 1. Run a game*
+
 ```
-# Play a game
 $ WINEPREFIX= GAMEID=0 PROTONPATH= ulwgl-run ~/foo.exe
 ```
 
+*Example 2. Run a game and apply a Protonfix*
+
 ```
-# Play a game and apply a GOG Protonfix
-# Can be a Steam or non-Steam game
+# Applies a GOG Protonfix to the current WINE prefix
+# See https://github.com/Open-Wine-Components/ULWGL-protonfixes
 $ WINEPREFIX= GAMEID=ulwgl-1228964594 PROTONPATH= STORE=gog ulwgl-run ~/foo.exe
 ```
 
+*Example 3. Run a game via a configuration file*
+
 ```
-# Play a non-Steam game by reading a configuration file
+# config.toml
 [ulwgl]
 prefix = "~/.wine"
 proton = "~/GE-Proton30"
@@ -43,37 +65,39 @@ store = "gog"
 $ ulwgl-run --config config.toml
 ```
 
+*Example 4. Create a ULWGL WINE prefix*
+
 ```
-# Create a ULWGL WINE prefix
 $ WINEPREFIX=~/foo GAMEID=0 PROTONPATH= ulwgl-run ""
 ```
 
-```
-# Play a game and download the latest ULWGL-Proton
-$ WINEPREFIX= GAMEID=0 ulwgl-run foo.exe
-```
+*Example 5. Run a game and automatically set Proton*
 
 ```
-# Play a game and automatically set Proton
-# Will first search ~/.local/share/Steam/compatibilitytools.d for latest
-# When a Proton cannot be found, ULWGL-Proton will be downloaded
+# First checks for a recent Proton at ~/.local/share/Steam/compatibilitytools.d
+# When Proton cannot be found, the latest ULWGL-Proton will be downloaded
+# The cache ~/.cache/ULWGL will be checked if the download fails or interrupted
 $ WINEPREFIX= GAMEID=0 ulwgl-run foo.exe
 ```
 
+*Example 6. Run a game, automatically set Proton, and create a WINE prefix*
+
 ```
-# Play a game, automatically set Proton and create a prefix
 # This will create the prefix as ~/Games/ULWGL/<ulwgl-$GAMEID>
 $ GAMEID=0 ulwgl-run foo.exe
 ```
 
+*Example 7. Run a game and explicitly set a valid Proton verb*
+
 ```
-# Play a game and explicitly set a valid Proton verb
 $ WINEPREFIX= GAMEID=0 PROTONPATH= PROTON_VERB=waitforexitandrun ulwgl-run ~/foo.exe
 ```
 
+*Example 8. Run a game and enable debug logs*
+
 ```
-# Play a game and enable debug logs
-# Valid values include: 1, warn, debug
+# Shows environment variables and command at this level
+# Valid values for ULWGL_LOG include: 1, warn, debug
 $ ULWGL_LOG=1 WINEPREFIX= GAMEID=0 PROTONPATH= ulwgl-run ~/foo.exe
 ```