♻️ gall — ship .mcp.json with GALL_HOME

cd into GALL_HOME (or .) so gleam finds its project. Daemon reads
GALL_WORKTREE from the consumer's PWD automatically.

Co-Authored-By: Mara <mara@systemic.engineer>

Author: Mara

.mcp.json

@@ -0,0 +1,12 @@
+{
+  "mcpServers": {
+    "gall": {
+      "type": "stdio",
+      "command": "bash",
+      "args": [
+        "-c",
+        "cd \"${GALL_HOME:-.}\" && exec nix develop .#default --command gleam run --module gall/daemon"
+      ]
+    }
+  }
+}