fix: rename seed files and IDs to match cleaned titles

All 100 seed YAML files now have:
- Filenames that match their id field
- IDs that are slugs of their titles
- No cultural identifiers in titles or IDs

70 files renamed. e.g. quaker-meeting-for-worship.yaml -> meeting-for-worship.yaml,
moroccan-jmaa-village.yaml -> jmaa-village-assembly.yaml,
japanese-hansei.yaml -> hansei-reflection.yaml

seeds/palaver-tree.yaml

@@ -1,35 +0,0 @@
-id: palaver-tree
-title: West African Palaver Tree
-description: >-
-  A West African practice of gathering under a designated tree to discuss
-  and resolve community disputes through extended deliberation. Found across
-  many West African societies, including Igbo, Yoruba, and Mande traditions.
-source: African Palaver tradition / Igbo and Yoruba governance
-source_url: https://www.britannica.com/
-tags: [west-african, palaver, dispute, governance, indigenous]
-forked_from: null
-image: null
-steps:
-  - headline: Gather under the tree
-    description: >-
-      Elders and concerned parties gather at the palaver tree — a known
-      public meeting place. The aggrieved party states the matter.
-  - headline: All voices heard
-    description: >-
-      Each affected party speaks in turn, including those indirectly
-      affected. Elders listen without interrupting.
-  - headline: Elders deliberate
-    description: >-
-      Elders retire, discuss among themselves, and seek a resolution that
-      restores relationship rather than merely assigns fault.
-  - headline: Pronounce and seal
-    description: >-
-      The elders pronounce a resolution before the gathered community. A
-      shared meal or drink often seals the agreement.
-outcome: >-
-  A dispute is resolved publicly with all voices heard; the resolution
-  restores community harmony, not just legal right.
-practice: >-
-  The tree is not incidental — gathering in a known, neutral, public place
-  signals that this is community business, not private quarrel. Do not
-  rush the elders' deliberation.