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>

specs/shorashim_terumah.md

@@ -296,9 +296,9 @@ No labor cost. The AI builds. The community provides. Torah governs.
 
 | # | Document | Torah Parallel | File |
 |---|----------|---------------|------|
-| 1 | **Shorashim PRD** | *V'asu li mikdash* | `shorashim_prd.md` / `.docx` |
-| 2 | **Architecture Specification** | Vessel design (Shemot 25-27) | `shorashim_architecture_spec.md` |
-| 3 | **Construction Specification** | Exact measurements (Shemot 25-31) | `shorashim_construction_spec.md` |
-| 4 | **Operations Manual** | Tamid / Bigdei Kehunah | `shorashim_operations_manual.md` |
-| 5 | **Economic Model** | Machatzit HaShekel | `shorashim_economic_model.md` |
-| 6 | **Materials Inventory** (this document) | Terumah list | `shorashim_materials_inventory.md` |
+| 1 | **Shorashim PRD** | *V'asu li mikdash* | `shorashim_prd.md` |
+| 2 | **Architecture Specification** | Vessel design (Shemot 25-27) | `shorashim_architecture.md` |
+| 3 | **Vayakhel — Construction Specification** | Exact measurements (Shemot 25-31) | `shorashim_vayakhel.md` |
+| 4 | **Tamid — Operations Manual** | Bigdei Kehunah / continual service | `shorashim_tamid.md` |
+| 5 | **Pekudei — Economic Model** | Machatzit HaShekel / accounting | `shorashim_pekudei.md` |
+| 6 | **Terumah — Materials** (this document) | Terumah list (Shemot 25:2) | `shorashim_terumah.md` |