refactor: bundle MCP servers inside plugins for cache compatibility

Claude Code only caches the plugin directory when installed from a
marketplace, not parent directories. This broke the shared mcp-servers/
architecture because relative paths like ../../mcp-servers/ resolved
to non-existent locations in the cache.

Changes:
- Move gitea and wikijs MCP servers into plugins/projman/mcp-servers/
- Move netbox MCP server into plugins/cmdb-assistant/mcp-servers/
- Update .mcp.json files to use ${CLAUDE_PLUGIN_ROOT}/mcp-servers/
- Update setup.sh to handle new bundled structure
- Add netbox.env config template to setup.sh
- Update CLAUDE.md and CANONICAL-PATHS.md documentation

This ensures plugins work correctly when installed and cached.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

mcp-servers/netbox/mcp_server/tools/__init__.py

@@ -1,20 +0,0 @@
-"""NetBox MCP tools package."""
-from .dcim import DCIMTools
-from .ipam import IPAMTools
-from .circuits import CircuitsTools
-from .virtualization import VirtualizationTools
-from .tenancy import TenancyTools
-from .vpn import VPNTools
-from .wireless import WirelessTools
-from .extras import ExtrasTools
-
-__all__ = [
-    'DCIMTools',
-    'IPAMTools',
-    'CircuitsTools',
-    'VirtualizationTools',
-    'TenancyTools',
-    'VPNTools',
-    'WirelessTools',
-    'ExtrasTools',
-]