refactor: 将默认路径从/rc更改为/leonos

统一修改代码中的默认路径，从/rc变更为/leonos，以反映系统名称变更

data/computercraft/lua/rom/apis/help.lua

@@ -6,7 +6,7 @@ local expect = require("cc.expect").expect
 local completion = require("cc.completion")
 
 local help = {}
-help._DEFAULT_PATH = "/rc/help"
+help._DEFAULT_PATH = "/leonos/help"
 
 function help.init()
   local vars = thread.vars()

data/computercraft/lua/rom/apis/keys.lua

@@ -14,7 +14,7 @@ elseif mcver <= 12 or _HOST:match("LeonOS%-PC") then
   kmap = "lwjgl2"
 end
 
-local base = dofile("/rc/keymaps/"..kmap..".lua")
+local base = dofile("/leonos/keymaps/"..kmap..".lua")
 local lib = {}
 
 -- reverse-index it!

data/computercraft/lua/rom/apis/shell.lua

@@ -32,7 +32,7 @@ function shell.init(env)
   copyIfPresent("aliases", vars)
   completions[vars.parentShell or 0] = completions[vars.parentShell or 0] or {}
 
-  vars.path = vars.path or ".:/rc/programs"
+  vars.path = vars.path or ".:/leonos/programs"
   vars.env = env or _ENV or _G
 end