Promote entire passepartout-economics/ to ideas/ root

All 31 files from ideas/passepartout-economics/ promoted to ideas/ root.
- Subfolder's passepartout-economics.org (42-line index) renamed to
  triad-index.org to avoid collision with root-level full doc
- index.org removed (redundant — triad-index.org replaces it)
- Root-level passepartout-economics.org: stripped file:passepartout-economics/
  prefix from all cross-references (now simple file:foo.org links)
- compliance-framework-mapping.org: same prefix cleanup
- All internal file: links within the economics docs already used simple
  names (no prefix) — they resolve correctly from ideas/ root

ideas/stoa.org

@@ -0,0 +1,16 @@
+:PROPERTIES:
+:ID:       c3b3dc41-945f-54e9-84eb-ca014114f1be
+:END:
+#+title: Stoa — The Porch (Environment)
+#+filetags: :passepartout:stoa:editor:browser:hardware:
+
+Stoa is the user environment — a single Lisp image where editor, browser, shell, and agent coexist.
+
+**Roadmap:**
+- v2.0.0: Lish editor + Nyxt browser (Stage 1, Qt/WebKit) + Lish shell
+- v3.0.0+: Cannibalization — replace Qt with Lisp-native layout, reduce WebKit to pixel-painting, eventually pure-Lisp browser and window management
+- v4.0.0: Native inference — llama.cpp FFI in-process, DSL-compiled model architectures, live surgery on cognition
+- v5.0.0: Hardware — tagged RISC-V architecture via TinyTapeout, FPGA prototype, hardware GC via dedicated bus master
+- v6.0.0: True agency — world models, temporal reasoning, goal persistence across restarts
+
+The architectural principle: Stoa is not a collection of clients connecting to a daemon. The Dispatcher gate stack [[file:verification-appliance.org][verifies every action]] regardless of who initiated it. The distinction between "tool" and "self" dissolves. The ultimate goal is a [[file:self-driving-lisp-machine.org][self-driving Lisp Machine]] running on custom hardware.