Merge OrbitOS into project — one install, everything ready

- Added 15 OrbitOS skills (bundled in skills/orbitos/)
- Added vault structure templates (views, templates, prompts)
- Added install.sh (macOS + Linux)
- Removed references/orbitos-skills.md (no longer needed)
- Updated README: 30 skills total, unified install flow

Total: 9 mm* + 6 dependencies + 15 orbitos = 30 skills

skills/orbitos/orbites-obsidian-bases/SKILL.md

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+---
+name: orbites-obsidian-bases
+description: Create and edit Obsidian Bases (.base files) — database-like views with filters, formulas, and summaries. Use when working with .base files in OrbitOS.
+---
+# OrbitOS: Obsidian Bases Reference
+
+Obsidian Bases are YAML files (`*.base`) that define dynamic views of notes.
+
+## Schema
+
+```yaml
+filters:          # Global: single filter string, or and/or/not nesting
+formulas:         # Computed properties (e.g., days_old: "((now() - file.ctime) / 86400000).round(0)")
+properties:       # Display names
+summaries:        # Custom summary formulas
+views:            # Array of view definitions
+  - type: table|cards|list|map
+    name: "View Name"
+    filters:      # View-specific filters
+    order:        # Columns to display
+    groupBy:      # Group settings
+```
+
+## Filter Syntax
+
+```yaml
+# Simple
+filters: 'status == "done"'
+
+# AND
+filters:
+  and:
+    - 'status == "done"'
+    - 'priority > 3'
+
+# OR, NOT, NESTED
+filters:
+  or:
+    - file.hasTag("tag")
+    - and:
+        - file.hasTag("book")
+        - file.inFolder("Folder")
+```
+
+## Built-in Properties
+
+- **File**: `file.name`, `file.basename`, `file.path`, `file.folder`, `file.ext`, `file.size`, `file.ctime`, `file.mtime`, `file.tags`, `file.links`, `file.backlinks`
+- **Frontmatter**: Any frontmatter key (e.g., `status`, `priority`)
+- **Formulas**: `formula.my_formula`
+
+## Functions
+
+- **Global**: `date()`, `now()`, `today()`, `if()`, `min()`, `max()`, `link()`
+- **String**: `contains()`, `startsWith()`, `endsWith()`, `lower()`, `replace()`, `split()`
+- **Number**: `abs()`, `ceil()`, `floor()`, `round()`, `toFixed()`
+- **List**: `contains()`, `filter()`, `map()`, `reduce()`, `join()`, `sort()`, `unique()`
+- **File**: `hasLink()`, `hasTag()`, `hasProperty()`, `inFolder()`
+- **Date**: `format()`, `relative()`, arithmetic with durations