vrepl: fix $tmpl('hello.txt') (fix #16789) (#16793)

vlib/v/parser/parser.v

@@ -811,6 +811,7 @@ fn (mut p Parser) other_stmts(cur_stmt ast.Stmt) ast.Stmt {
 		}
 
 		p.open_scope()
+		p.cur_fn_name = 'main.main'
 		mut stmts := []ast.Stmt{}
 		if cur_stmt != ast.empty_stmt {
 			stmts << cur_stmt

vlib/v/tests/repl/comptime_tmpl.repl

@@ -0,0 +1,3 @@
+$tmpl('./tmpl/hello.txt')
+===output===
+hello

vlib/v/tests/repl/runner/runner.v

@@ -49,6 +49,9 @@ pub fn run_repl_file(wd string, vexec string, file string) !string {
 	input_temporary_filename := os.real_path(os.join_path(wd, 'input_temporary_filename.txt'))
 	os.write_file(input_temporary_filename, input) or { panic(err) }
 	os.write_file(os.real_path(os.join_path(wd, 'original.txt')), fcontent) or { panic(err) }
+	os.cp_all('vlib/v/tests/repl/tmpl', os.real_path(os.join_path(wd, 'tmpl')), true) or {
+		panic(err)
+	}
 	rcmd := '${os.quoted_path(vexec)} repl -replfolder ${os.quoted_path(wd)} -replprefix "${fname}." < ${os.quoted_path(input_temporary_filename)}'
 	r := os.execute(rcmd)
 	if r.exit_code != 0 {

vlib/v/tests/repl/tmpl/hello.txt

@@ -0,0 +1 @@
+hello