Really enable Ghidra's Developer plugins in both tools

A bare <PACKAGE NAME="Developer" /> only adds the package's RELEASED
plugins, so half of them (the STABLE ones) were missing and Configure
showed Developer unticked. The project window wasn't configured at all.

- CodeBrowser: insert ghidra/codebrowser-developer.xml, which lists the
  STABLE plugins explicitly, into the default CodeBrowser.tool in
  Public_Release.jar.
- Project window: it has no default config to patch, so ship
  ghidra/FrontEndTool.xml in the user settings with its three
  Developer plugins.
- Pre-creating the settings dir makes Ghidra show its user agreement;
  ghidra/preferences sets USER_AGREEMENT=ACCEPT, the value Ghidra
  writes by itself on a fresh start.

Verified by closing Ghidra cleanly: it rewrites FrontEndTool.xml from
the loaded plugins and kept all three Developer plugins.

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

ghidra/FrontEndTool.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Initial config for Ghidra's project window (front end). Ghidra overwrites
+     it on exit; it is copied into the image so that every container start
+     opens with the "Developer" plugin package enabled (File > Configure). -->
+<!-- VERSION must match GHIDRA_VERSION in the Dockerfile. -->
+<FRONTEND VERSION="12.2">
+    <TOOL_CONFIG CONFIG_NAME="NO_LONGER_USED">
+        <ICON LOCATION="view_detailed.png" />
+        <TOOL TOOL_NAME="Ghidra: NO ACTIVE PROJECT" INSTANCE_NAME="">
+            <OPTIONS />
+            <PACKAGE NAME="Utility" />
+            <PACKAGE NAME="Ghidra Core" />
+            <!-- Developer plugins that may run in the project window. All are
+                 STABLE, not RELEASED, so each must be listed explicitly. -->
+            <PACKAGE NAME="Developer">
+                <INCLUDE CLASS="ghidra.app.plugin.debug.DomainFolderChangesDisplayPlugin" />
+                <INCLUDE CLASS="ghidra.app.plugin.debug.GenerateOldLanguagePlugin" />
+                <INCLUDE CLASS="ghidra.app.plugin.debug.JavaHelpPlugin" />
+            </PACKAGE>
+            <ROOT_NODE X_POS="560" Y_POS="240" WIDTH="800" HEIGHT="600" EX_STATE="0" FOCUSED_OWNER="FrontEnd Tool" FOCUSED_NAME="FrontEnd" FOCUSED_TITLE="Project Window">
+                <COMPONENT_NODE TOP_INFO="0">
+                    <COMPONENT_INFO NAME="FrontEnd" OWNER="FrontEnd Tool" TITLE="Project Window" ACTIVE="true" GROUP="Default" />
+                </COMPONENT_NODE>
+            </ROOT_NODE>
+        </TOOL>
+    </TOOL_CONFIG>
+</FRONTEND>