Fix config loader paths for dynamic loading

[Copilot]

The config loader was using incorrect paths that would fail at runtime. The include() function requires paths relative to lua/ directory, but the loader was constructing incomplete paths.

Changes

• Fixed loader path construction: Updated sv_config.lua to use cfc_random_spawn/configs/ prefix instead of configs/
• Fixed variant config includes: Updated 5 files (night/day variants) to use full paths when including base configs:
  • gm_boreas_night.lua, gm_novenka_night.lua, gm_tornadoalley_day.lua
  • rp_nycity.lua, rp_southside_day.lua
• Added path traversal protection: Validate map name before constructing file path

Before/After

-- Before (broken)
local configPath = "configs/" .. game.GetMap() .. ".lua"
include( configPath )  -- Won't resolve correctly

-- After (working)
local mapName = game.GetMap()
if not mapName or mapName == "" or string.find( mapName, "[/\\]" ) then
    return
end
local configPath = "cfc_random_spawn/configs/" .. mapName .. ".lua"
include( configPath )  -- Resolves from lua/ directory

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.