feat: port arbor, dharma, forge El source into monorepo

Brings the remaining foundation repos that were not included in the
original monorepo consolidation:

- arbor/vessels/ — 6 vessels (arbor-cli, arbor-core, arbor-diagram,
  arbor-layout, arbor-parse, arbor-render) with manifests + src/main.el
- dharma/ — CGI Provenance Registry package (flat layout, 14 .el files
  across registry/, sandbox/, training/, validation/, tests/)
- forge/ — consciousness channel tool (8 src .el files + new manifest.el)
- elp/src/ — 36 test fixture files not carried over in original merge
  (dedup_*, realizer_*, semantics_*, morph_*, ext_*, one_extern_* helpers)

el-ide, engram, elql are already complete in ide/, engram/, ql/.

dharma/manifest.el

@@ -0,0 +1,12 @@
+package "dharma" {
+    version "1.0.0"
+    description "DHARMA CGI Provenance Registry — El implementation"
+    authors ["Will Anderson <will.anderson@neurontechnologies.ai>"]
+    edition "2026"
+}
+
+build {
+    target "debug"
+    entry "src/main.el"
+    output "dist/"
+}