fix(rocks): use forward slash in package.path and package.cpath

The enable() function used backslash separators (\?.lua, \?\init.lua,
\\?.ext) which only work on Windows. On Unix systems this produces
invalid paths like /usr/share/lua/5.4\?.lua.

Lua's package.path uses forward slashes on all platforms. Fix all
three patterns to use / instead of \.

Author: wsdjeg

lua/plug/rocks/init.lua

@@ -61,18 +61,16 @@ function M.enable()
       vim.system({ 'luarocks', 'config', '--json' }):wait().stdout
     )
     package.path = string.format(
-      '%s;%s%s;%s%s;',
+      '%s;%s/?.lua;%s/?/init.lua;',
       package.path,
       luarocks_config.deploy_lua_dir,
-      [[\?.lua]],
-      luarocks_config.deploy_lua_dir,
-      [[\?\init.lua]]
+      luarocks_config.deploy_lua_dir
     )
     --- D:\Scoop\apps\luarocks\current\rocks\lib\lua\5.4\?.dll
     package.cpath = package.cpath
       .. ';'
       .. luarocks_config.deploy_lib_dir
-      .. '\\?.'
+      .. '/?.'
       .. luarocks_config.external_lib_extension
     vim.env.LUA_PATH = package.path
     vim.env.LUA_CPATH = package.cpath

test/rocks_spec.lua

@@ -0,0 +1,37 @@
+-- test/rocks_spec.lua
+-- Tests for plug.rocks module
+
+local lu = require('luaunit')
+local rocks = require('plug.rocks')
+
+local TestRocks = {}
+
+function TestRocks:testUnifyPathExists()
+  lu.assertEquals(type(rocks.unify_path), 'function')
+end
+
+function TestRocks:testUnifyPathBasic()
+  local result = rocks.unify_path('/tmp/test.lua')
+  lu.assertNotNil(result)
+  lu.assertStrContains(result, 'test.lua')
+end
+
+function TestRocks:testGetReturnsNilForUnknownRock()
+  -- get() should return nil for a non-existent rock name
+  local result = rocks.get('nonexistent-rock-12345')
+  lu.assertNil(result)
+end
+
+function TestRocks:testEnableDoesNotError()
+  -- enable() should not error even if luarocks is not installed
+  rocks.enable()
+  lu.assertTrue(true)
+end
+
+function TestRocks:testSetRtpDoesNotErrorForUnknownSpec()
+  rocks.set_rtp({ name = 'nonexistent-rock-12345' })
+  lu.assertTrue(true)
+end
+
+return TestRocks
+