feat(core): the command line with its local commands after Java, measured against Java

The terminal splits a line as Java's window does and runs ls, cd, pwd,
mkdir, touch, cp, mv, rm, cat, test, help, ipconfig and route on the
node's files, which are the project's own. Its texts are generated from
the bundle Java loads. TerminalCases feeds Java's Terminal without a
network (16 cases, de and en); eight cases name Java bugs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/code_language_allow.txt

@@ -86,3 +86,5 @@ packages/core/test/routerWebJava.test.ts::konfig
 packages/core/src/runtime/apps/emailServer.ts::smtpmitarbeiter
 packages/core/src/runtime/apps/emailServer.ts::pop3mitarbeiter
 packages/core/src/runtime/apps/emailClient.ts::smtpclient
+# arpsend: a command only FILIUS' terminal has (send an ARP reply); named as Java names it.
+packages/core/src/runtime/apps/::arpsend