scaffold PKB directories, templates, and Obsidian Bases

Establishes the knowledge-base substrate the Council now sits on top of:
daily/, inbox/ (+ raw/ for AudioPen drops), notes/, projects/,
reading/, reflections/, reviews/, _templates/. Each folder seeded with
a .gitkeep so the structure is committed even when empty.

Six templates under _templates/ define the canonical shape for each
note type (daily, permanent, project, reading, reflection, fleeting).
Frontmatter includes the type: field so the Bases below can filter on
it without collision with the existing council-* vocabulary.

Five new Obsidian Bases at repo root: notes.base, projects.base (with
active / all views), reading.base (to-read / reading / done views),
reflections.base (combined reflections + weekly + monthly reviews),
and inbox.base (fleeting notes awaiting triage).

Expanded .obsidian/app.json userIgnoreFilters to hide _templates and
scripts from the vault index so they don't clutter the graph, search,
or file explorer.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

reflections.base

@@ -0,0 +1,52 @@
+filters:
+  or:
+    - note.type == "reflection"
+    - note.type == "review-week"
+    - note.type == "review-month"
+
+properties:
+  note.type:
+    displayName: Kind
+  note.date:
+    displayName: Date
+  note.member:
+    displayName: Member
+  note.scope:
+    displayName: Scope
+  note.window:
+    displayName: Window
+
+views:
+  - type: table
+    name: All reflections and reviews
+    order:
+      - file.name
+      - type
+      - date
+      - member
+      - scope
+    sort:
+      - property: date
+        direction: DESC
+  - type: table
+    name: Weekly reviews
+    filters:
+      and:
+        - note.type == "review-week"
+    order:
+      - file.name
+      - date
+    sort:
+      - property: date
+        direction: DESC
+  - type: table
+    name: Monthly reviews
+    filters:
+      and:
+        - note.type == "review-month"
+    order:
+      - file.name
+      - date
+    sort:
+      - property: date
+        direction: DESC