refactor: Move plugin into claude-code-plugin subdirectory

Reorganize plugin files into a dedicated subdirectory to keep
them separate from the main Basic Memory Python package:

- Move all plugin files to claude-code-plugin/
- Add README.md with quick start guide
- Update installation paths to use subdirectory

New structure:
```
claude-code-plugin/
├── .claude-plugin/
│   ├── plugin.json
│   └── marketplace.json
├── commands/
├── skills/
├── hooks/
├── README.md
└── PLUGIN.md
```

Installation:
/plugin marketplace add basicmachines-co/basic-memory/claude-code-plugin
/plugin install basic-memory@basicmachines

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: phernandez <paul@basicmachines.co>

claude-code-plugin/PLUGIN.md

@@ -21,7 +21,7 @@ Then add it to your Claude Code MCP configuration.
 ### Add the Marketplace
 
 ```
-/plugin marketplace add basicmachines-co/basic-memory
+/plugin marketplace add basicmachines-co/basic-memory/claude-code-plugin
 ```
 
 ### Install the Plugin
@@ -41,7 +41,8 @@ Add to your `.claude/settings.json`:
       "basicmachines": {
         "source": {
           "source": "github",
-          "repo": "basicmachines-co/basic-memory"
+          "repo": "basicmachines-co/basic-memory",
+          "path": "claude-code-plugin"
         }
       }
     },
@@ -243,7 +244,7 @@ This plugin leverages Basic Memory's MCP tools:
 ## Plugin Structure
 
 ```
-basic-memory/
+claude-code-plugin/
 ├── .claude-plugin/
 │   ├── plugin.json          # Plugin manifest
 │   └── marketplace.json     # Self-hosted marketplace
@@ -262,7 +263,8 @@ basic-memory/
 │   └── knowledge-organize/
 ├── hooks/
 │   └── hooks.json           # Hook definitions
-└── PLUGIN.md                # This file
+├── README.md                # Quick start guide
+└── PLUGIN.md                # Full documentation
 ```
 
 ---

claude-code-plugin/README.md

@@ -0,0 +1,95 @@
+# Basic Memory Plugin for Claude Code
+
+A Claude Code plugin that integrates [Basic Memory](https://basicmemory.io) - a local-first knowledge management system built on the Model Context Protocol (MCP).
+
+## What This Plugin Does
+
+This plugin helps Claude Code work seamlessly with your Basic Memory knowledge base:
+
+- **Capture knowledge** from conversations automatically
+- **Resume previous work** by building context from your knowledge graph
+- **Edit notes** interactively through conversation
+- **Organize your knowledge** by finding orphans, suggesting links, and maintaining structure
+
+## Installation
+
+### 1. Install Basic Memory
+
+```bash
+pip install basic-memory
+# or
+pipx install basic-memory
+```
+
+### 2. Add the Marketplace
+
+```
+/plugin marketplace add basicmachines-co/basic-memory/claude-code-plugin
+```
+
+### 3. Install the Plugin
+
+```
+/plugin install basic-memory@basicmachines
+```
+
+## Commands
+
+| Command | Description |
+|---------|-------------|
+| `/remember [title]` | Capture insights from the current conversation |
+| `/continue [topic]` | Resume previous work with context |
+| `/context <memory://url>` | Build context from a specific note |
+| `/recent [timeframe]` | Show recent activity |
+| `/organize [action]` | Maintain your knowledge graph |
+
+### Examples
+
+```bash
+# Capture what we just discussed
+/remember "Database Design Decision"
+
+# Pick up where we left off
+/continue postgres migration
+
+# Check recent changes
+/recent 1week
+
+# Find orphan notes and suggest links
+/organize orphans
+```
+
+## Skills
+
+Skills are model-invoked - Claude uses them automatically when the context fits.
+
+| Skill | What It Does |
+|-------|--------------|
+| `knowledge-capture` | Auto-captures decisions and insights into structured notes |
+| `continue-conversation` | Builds context when resuming previous work |
+| `spec-driven-development` | Guides implementation based on specs in Basic Memory |
+| `edit-note` | Edits notes via MCP tools (cloud-compatible) |
+| `edit-note-local` | Edits notes as files (local installations) |
+| `knowledge-organize` | Helps organize and link notes |
+
+## Hooks
+
+| Event | Behavior |
+|-------|----------|
+| `PostToolUse: write_note` | Confirms when notes are saved |
+| `Stop` | Suggests capturing valuable insights after conversations |
+
+## Requirements
+
+- [Claude Code](https://claude.com/claude-code)
+- [Basic Memory](https://basicmemory.io) with MCP server configured
+
+## Documentation
+
+- [Full Plugin Documentation](./PLUGIN.md)
+- [Basic Memory Docs](https://docs.basicmemory.io)
+- [Claude Code Plugins](https://code.claude.com/docs/en/plugins)
+
+## License
+
+MIT - See the [Basic Memory repository](https://github.com/basicmachines-co/basic-memory) for details.