feat: expand seed library from 6 to 100 protocols

Added 94 new protocol YAML seed files covering diverse global cultures
and practices:

Indigenous & traditional: Maori powhiri, Aboriginal yarning, Somali xeer,
Moroccan jmaa, Tswana kgotla, Zulu imbizo, Peruvian ronda campesina,
Ohlone land-back, Inuit IQ consensus, Haudenosaunee condolence,
Navajo peacemaking, Ojibwe pipe ceremony, Polynesian talanoa,
Rwandan gacaca, West African palaver tree, Mexican tequio,
Javanese musyawarah-mufakat, Tibetan story council, Korean yangban,
Filipino utari, Ainu practices

Religious communities: Quaker meeting for business, clearness committee,
Amish shunning (Meidung), Mennonite discernment, Jewish hevruta,
Rastafari nyabinghi reasoning

Facilitation: World Cafe, Open Space, Future Search, Six Thinking Hats,
Dynamic Facilitation, Socratic Seminar, Delphi method, Copenhagen
Consensus, Lean Coffee, Hackathon sprint, Agile retrospective,
Stand-up meeting, Pair programming, Roadmap planning

Governance: Sociocratic consent selection, Dynamic self-governance,
Cooperative consensus, Hackerspace consensus, Mastodon governance,
Climate assemblies (x2), Basque asamblearismo

Conflict & repair: Restorative conference, circle sentencing,
Nonviolent Communication (3 protocols), Active listening mirror,
Appreciative apology repair

Community & care: Community kitchen, Gratefulness circle, Passing circle,
Paired walking, Deep listening dyad, Mutual aid, Permaculture charrette

Education: Barefoot College night school, Socratic seminar

Everyday: Various greeting, transition, and gratitude protocols

All protocols credit original sources. Cultural context noted in
descriptions. All YAML files validated.

seeds/gratefulness-circle.yaml

@@ -0,0 +1,34 @@
+id: gratefulness-circle
+title: Gratefulness Circle
+description: >-
+  A simple closing practice where each person in a group names one thing
+  they are grateful for from the time together. Found in many community
+  and spiritual traditions as a way of marking endings with attention.
+source: Common community practice / Gratefulness.org
+source_url: https://www.gratefulness.org/
+tags: [gratitude, closing, reflection, community]
+forked_from: null
+image: null
+steps:
+  - headline: Frame the round
+    description: >-
+      The facilitator invites each person to name one thing they are
+      grateful for from the gathering, however small.
+  - headline: Go around
+    description: >-
+      Each person speaks in turn, briefly. Passing is always welcome;
+      silence is a valid offering.
+  - headline: Hold without comment
+    description: >-
+      The group receives each offering without response or comment. No
+      gratitude is too small or too ordinary.
+  - headline: Close
+    description: >-
+      The facilitator closes, often with a moment of silence, marking the
+      end of the gathering.
+outcome: >-
+  The gathering closes with each person having named what they received,
+  deepening attention and closing well.
+practice: >-
+  Resist commenting on others' gratitude. The practice is offering, not
+  discussion. A round of three minutes can change how a meeting ends.