feat(common): sports consolidation stage 4 -- the identical sweep (plugin host, live scroll, display rules, font path) (#705)

Moves the code every scoreboard plugin carries identically into core: src.common.sports_plugin_host, sports_live_scroll, sports_display_rules and sports_font_path, with unit tests and a parity test against the ledmatrix-plugins copies (LEDMATRIX_PLUGINS).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/common/sports_font_path.py

@@ -0,0 +1,41 @@
+"""Where a scoreboard's bundled font file is, whatever the working directory.
+
+Every scoreboard's ``sports.py`` (nine) and ``game_renderer.py`` (eight)
+carries the same module-level ``_resolve_font_path``. It predates
+:func:`src.common.font_layout.resolve_asset_path`, and probes the core for
+it: the path as given when it exists (relative to the cwd), else the core's
+resolver (``FontManager._resolve_asset_path``, which delegates to
+``resolve_asset_path``), else the path joined to the install root, else the
+path unchanged so the caller's ``ImageFont.truetype`` raises and falls back
+as before.
+
+On every core this module ships in, the probe always finds the resolver, and
+the install-root join repeats what the resolver already tried. What is left
+is two steps, and :func:`resolve_font_path` is exactly those: the cwd first,
+then ``resolve_asset_path``. ``test/test_sports_font_path.py`` checks that
+against the plugins' own copies, path for path. It is the same rule as
+``sports_shared._resolve_font_path``, made public so a plugin can import it.
+
+Why not ``resolve_asset_path`` alone: it never consults the cwd, so a
+process started from another checkout would switch to the install root's
+fonts. Keeping the cwd first keeps that behaviour exactly.
+"""
+
+import os
+
+from src.common.font_layout import resolve_asset_path
+
+
+def resolve_font_path(path: str) -> str:
+    """``path`` if it exists, else :func:`resolve_asset_path` of it.
+
+    Absolute paths that exist come back untouched; a relative path is tried
+    against the cwd, then the install root; a path found nowhere comes back
+    unchanged, so the caller still raises and falls back.
+    """
+    if os.path.exists(path):
+        return path
+    return resolve_asset_path(path)
+
+
+__all__ = ["resolve_font_path"]