fix: rename environment variables to match MCP server expectations

Gitea MCP server expects:
- GITEA_API_URL (not GITEA_URL) - must include /api/v1
- GITEA_API_TOKEN (not GITEA_TOKEN)

NetBox MCP server expects:
- NETBOX_API_URL (not NETBOX_URL) - must include /api
- NETBOX_API_TOKEN (not NETBOX_TOKEN)

Changes:
- Update all setup commands to use correct variable names
- Update docs/CONFIGURATION.md with correct variables and URL format
- Update scripts/setup.sh templates
- Update CLAUDE.md hybrid configuration reference
- Remove GITEA_ORG from system-level config (it's project-level)
- Fix API URL paths in curl commands (remove redundant /api/v1)

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

plugins/projman/commands/project-init.md

@@ -24,7 +24,7 @@ Fast setup for a new project when system-level configuration is already complete
 Quickly verify system setup is complete:
 
 ```bash
-cat ~/.config/claude/gitea.env 2>/dev/null | grep -v "^#" | grep -v "PASTE_YOUR" | grep "GITEA_TOKEN=" && echo "SYSTEM_OK" || echo "SYSTEM_MISSING"
+cat ~/.config/claude/gitea.env 2>/dev/null | grep -v "^#" | grep -v "PASTE_YOUR" | grep "GITEA_API_TOKEN=" && echo "SYSTEM_OK" || echo "SYSTEM_MISSING"
 ```
 
 **If SYSTEM_MISSING:**
@@ -107,7 +107,7 @@ Verify the repository exists and is accessible:
 
 ```bash
 source ~/.config/claude/gitea.env
-curl -s -o /dev/null -w "%{http_code}" -H "Authorization: token $GITEA_TOKEN" "$GITEA_URL/api/v1/repos/<detected-org>/<detected-repo>"
+curl -s -o /dev/null -w "%{http_code}" -H "Authorization: token $GITEA_API_TOKEN" "$GITEA_API_URL/repos/<detected-org>/<detected-repo>"
 ```
 
 | HTTP Code | Action |