refactor(cli)!: split the contributor tool out of the ludic CLI

`ludic help` ended with a section titled "contributing to the toolchain itself",
listing bootstrap, reseed, docs-gen and release tasks. None of that is available
to someone who installed the language — those tasks need the repository — so the
shipped tool was advertising work its user cannot do, in a namespace they have to
read past to find `new` and `run`.

The tasks move to a second program, dev.ludic -> bin/ludic-dev, built from a
checkout and excluded from every release artifact. `ludic` keeps the project and
package commands and nothing else; `ludic dev …` now explains where the tasks
went instead of failing as an unknown command.

What this shook out: the two programs share prelude/build/project/pkg, so the
helpers each had accreted in whichever file first needed them — cc(),
ensure_ludicc, the string functions, title_case, cmd_version — moved to where
both can see them. The argument-shift indirection added for the `dev` namespace
is gone with the namespace, so commands read argv directly again.

`ludic-dev test` asserts the split rather than trusting it: the staged install
must build a project, and `ludic dev build` there must fail while naming
ludic-dev. install.sh keeps building older tags, whose bootstrap goes through
main.ludic.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tools/editors/jetbrains/src/main/kotlin/io/ludic/ide/LudicServer.kt

@@ -17,7 +17,7 @@ import java.io.File
 
 /**
  * Where to find the toolchain. Both paths may be left blank, in which case the
- * plugin looks under the project root for what `bin/ludic dev tools` produces —
+ * plugin looks under the project root for what `bin/ludic-dev tools` produces —
  * which is the case for anyone working in the Ludic repository itself.
  */
 @Service(Service.Level.PROJECT)
@@ -121,7 +121,7 @@ class LudicConnectionProvider(private val project: Project) : ProcessStreamConne
             append("  on PATH, and in ~/.ludic/bin.\n")
         }
         append("\nInstall the toolchain (curl -fsSL https://workshopsoft.pages.workshopsoft.io/ludic/install.sh | sh), ")
-        append("build it with `bin/ludic dev tools` from a checkout, ")
+        append("build it with `bin/ludic-dev tools` from a checkout, ")
         append("or set the path in Settings | Languages & Frameworks | Ludic. ")
         append("Syntax highlighting works without it; completion and diagnostics do not.")
     }

tools/editors/jetbrains/src/main/resources/META-INF/plugin.xml

@@ -67,7 +67,7 @@
             name="Ludic"
             factoryClass="io.ludic.ide.LudicLanguageServerFactory">
             <description><![CDATA[
-            The Ludic language server. Built by <code>bin/ludic dev tools</code>.
+            The Ludic language server. Built by <code>bin/ludic-dev tools</code>.
             ]]></description>
         </server>
         <languageMapping language="Ludic" serverId="ludic"/>