fix(bun getcompletes) add windows support and remove TODO panic (#24620)

### What does this PR do?
Fixes https://linear.app/oven/issue/ENG-21509/panic-todo-in-completions
### How did you verify your code works?
Test

src/cli/run_command.zig

@@ -1053,9 +1053,6 @@ pub const RunCommand = struct {
                                 bun.copy(u8, path_buf[dir_slice.len..], base);
                                 path_buf[dir_slice.len + base.len] = 0;
                                 const slice = path_buf[0 .. dir_slice.len + base.len :0];
-                                if (Environment.isWindows) {
-                                    @panic("TODO");
-                                }
                                 if (!(bun.sys.isExecutableFilePath(slice))) continue;
                                 // we need to dupe because the string pay point to a pointer that only exists in the current scope
                                 _ = try results.getOrPut(this_transpiler.fs.filename_store.append(@TypeOf(base), base) catch continue);