Apply hex faction colors to chat/tab formatting using styled Components

[plan3t]

Motivation

• Faction color updates using hex values were not reliably reflected in chat and tab outputs because legacy section-sign formatting codes were embedded in plain strings instead of applying component styles.
• The goal is to make faction color changes immediately take effect in chat/tab by applying the hex RGB as a real TextColor on Component output and preserve configurable format tokens like {faction_color} and {reset}.

Description

• Refactor FactionTextFormatter to build and return a styled Component instead of producing a plain string with legacy formatting codes, by replacing applyFormat to produce MutableComponent output.
• Implement token-driven styling: {faction_color} applies Style.withColor(TextColor.fromRgb(...)), {reset} resets to Style.EMPTY, and placeholders {faction}, {player}, {message}, and {role} append text under the current style.
• Add appendLiteral helper to append styled literal segments to the resulting MutableComponent.
• Keep existing integration points: formatChat uses FactionConfig.SERVER.* formats and formatTabList still uses the tab format string.

Testing

• Ran ./gradlew compileJava, which completed successfully (BUILD SUCCESSFUL).
• No automated unit tests were added or modified in this change.

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Codex Task