Rename spec files to Torah-faithful names per parshah

Each spec corresponds to a parshah of Shemot. The earlier names
were generic English (materials, operations, construction,
economic_model). Torah names them precisely:

- Shemot 25:2 — terumah (תרומה, root רום, "what is lifted")
- Shemot 27:20 — tamid (תמיד, "continual" — the lamp that never goes out)
- Shemot 35:1 — vayakhel (קהל, "assembled" — community-formed building)
- Shemot 38:21 — pekudei (פקד, "accounted" — every material counted)

Renames:
  shorashim_materials.md       → shorashim_terumah.md
  shorashim_operations.md      → shorashim_tamid.md
  shorashim_construction.md    → shorashim_vayakhel.md
  shorashim_economic_model.md  → shorashim_pekudei.md

Updated cross-references in:
- README.md (parshah table + repo tree, also fixed stale tree
  showing src/ and transcripts/ that no longer exist)
- AGENTS.md
- BUILD_KORBAN.md
- specs/shorashim_terumah.md (internal Document Registry)

Generic English is silver. Torah's words are gold (Mishlei 25:11).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

AGENTS.md

@@ -20,10 +20,10 @@ before writing code. Do not summarize from memory. Read fresh.
 |----------|------|-----------------|
 | PRD | `specs/shorashim_prd.md` | What the system does and for whom |
 | Architecture | `specs/shorashim_architecture.md` | How each component is built |
-| Construction | `specs/shorashim_construction.md` | Exact versions, dimensions, API contracts |
-| Operations | `specs/shorashim_operations.md` | How it runs in production |
-| Economic Model | `specs/shorashim_economic_model.md` | How it is funded |
-| Materials | `specs/shorashim_materials.md` | What is gathered, what must be built |
+| Vayakhel (Construction) | `specs/shorashim_vayakhel.md` | Exact versions, dimensions, API contracts |
+| Tamid (Operations) | `specs/shorashim_tamid.md` | How it runs in production |
+| Pekudei (Economic Model) | `specs/shorashim_pekudei.md` | How it is funded |
+| Terumah (Materials) | `specs/shorashim_terumah.md` | What is gathered, what must be built |
 | Structure Principle | `specs/structure_not_content.md` | What the system IS, not what it knows |
 | Broken Tablets | `specs/broken_tablets/README.md` | Read this FIRST — see where the calf was |
 | Build Day One | `BUILD_DAY_ONE.md` | First build instruction |