hyprlock: add general:pam_module and $PROMPT variable for input:place… (#582)

* hyprlock: add general:pam_module and $PROMPT variable for input:placeholder_text

* hyprlock: add $PROMPT variable for labels

pages/Hypr Ecosystem/hyprlock.md

@@ -22,6 +22,7 @@ Variables in the `general` category:
 | no_fade_in | disables the fadein animation | bool | false |
 | no_fade_out | disables the fadeout animation | bool | false |
 | ignore_empty_input | skips validation when empty password is provided | bool | false |
+| pam_module | sets the pam module used for authentication. If the module isn't found in `/etc/pam.d`, "su" will be used as a fallback | str | hyprlock |
 
 ## Keyboard Shortcuts and Actions
 
@@ -195,6 +196,9 @@ Behaviour of `swap_font_color` is as follows:
 
 {{< /callout >}}
 
+Available variables for `placeholder_text`:
+ - `$PROMPT` - prompt text provided by pam. Usually this will be "Password: ", but it depends on your pam configuration.
+
 Available variables for `fail_text`:
  - `$FAIL` - pam fail reason
  - `$ATTEMPTS` - number of failed authentication attempts
@@ -224,6 +228,7 @@ Available variables for `text`:
  - `$USER` - username (e.g. linux-user)
  - `$DESC` - user description (e.g. Linux User)
  - `$TIME` - current time (e.g. `13:37`)
+ - `$PROMPT` - last pam prompt
  - `$FAIL` - last pam fail reason
  - `$ATTEMPTS` - failed attempts
  - `$LAYOUT` - current keyboard layout