1.0.4c-zio4: chat labels in tags.json

The dead marker and the (T)/(CT)/(SPEC)/(NONE) team-chat labels come from a new optional "chat"
section in tags.json, with colour tags; "" drops a label, and missing keys keep the old defaults.

README.md

@@ -57,6 +57,20 @@ Fields (all optional, empty means "not set"):
 - `scoreboard` - clan tag on the scoreboard, without brackets (CS2 adds them); empty leaves the
   player's own clan tag.
 
+The optional `chat` section sets the labels CS2-Tags adds to the chat lines it prints (only for
+players whose tag changes their chat). Leave a key out for its default, or set it to `""` to drop
+the label:
+
+```jsonc
+"chat": {
+  "dead":      "{White}☠",     // before a dead player's line
+  "team_t":    "{Yellow}(T)",  // start of team chat, per team
+  "team_ct":   "{Blue}(CT)",
+  "team_spec": "(SPEC)",
+  "team_none": "(NONE)"
+}
+```
+
 Colours: any `ChatColors` field name in braces, case-insensitive, e.g. `{Red}`, `{LightBlue}`,
 `{Gold}`, `{Grey}`, plus `{TEAMCOLOR}`.
 
@@ -77,4 +91,4 @@ FORGEJO_TOKEN=... ./release.sh v<ModuleVersion>
 
 `release.sh` rebuilds from the committed source and publishes `CS2-Tags-<tag>.tar.gz`, laid out
 like `game/csgo/`, to https://git.zio.sh/cs2/CS2-Tags. The tag must equal `v<ModuleVersion>`
-(`v1.0.4c-zio3` now).
+(`v1.0.4c-zio4` now).