docs(ideation): Add intent_dsl_survey_20260612 phase 1 outline + state

Phase 1 of 4. Adds:
- conductor/tracks/intent_dsl_survey_20260612/state.toml (28 tasks,
  4 phases, 14 verification flags)
- conductor/tracks/intent_dsl_survey_20260612/metadata.json
  (research-only, no blockers, time-sensitive)
- conductor/tracks/intent_dsl_survey_20260612/research/ (subfolder
  for Tier 2 sub-agent sub-reports)
- docs/ideation/2026-06-12-intent-based-scripting-languages.md
  (outline stub: header + 7 sections + Appendix, all stubbed with
  1-paragraph descriptions; actual content to be written in
  phases 2-3, with Tier 2 sub-agents handling the research-heavy
  prior-art clusters 0-4)

conductor/tracks/intent_dsl_survey_20260612/metadata.json

@@ -0,0 +1,24 @@
+{
+  "track_id": "intent_dsl_survey_20260612",
+  "name": "Intent-Based Scripting Languages Survey",
+  "created": "2026-06-12",
+  "priority": "A (research)",
+  "status": "active",
+  "type": "research-only",
+  "domain": "Meta-Tooling",
+  "blocked_by": [],
+  "deliverable": "docs/ideation/2026-06-12-intent-based-scripting-languages.md",
+  "consumed_by": [
+    "nagent v2.2 (Future-Track Candidate #4: Intent-based DSL)",
+    "intent_dsl_for_meta_tooling_20260608_PLACEHOLDER (per mcp_architecture_refactor_20260606/spec.md §12.1)",
+    "future interpreter prototype (follow-up B track)"
+  ],
+  "estimated_size": "3500-5000 lines",
+  "time_sensitive": "Hard boundary for when user can start the next nagent track",
+  "spec_commit": "b389f1be",
+  "spec_path": "conductor/tracks/intent_dsl_survey_20260612/spec.md",
+  "plan_commit": "5ef68a00",
+  "plan_path": "conductor/tracks/intent_dsl_survey_20260612/plan.md",
+  "state_path": "conductor/tracks/intent_dsl_survey_20260612/state.toml",
+  "research_dir": "conductor/tracks/intent_dsl_survey_20260612/research/"
+}