feat: implement composite API key scopes for workspaces and templates (#19945)

# Add Composite API Key Scopes

This PR adds high-level composite API key scopes to simplify token creation with common permission sets:

- `coder:workspaces.create` - Create and update workspaces
- `coder:workspaces.operate` - Read and update workspaces
- `coder:workspaces.delete` - Read and delete workspaces
- `coder:workspaces.access` - Read, SSH, and connect to workspace applications
- `coder:templates.build` - Read templates and create/read files
- `coder:templates.author` - Full template management with insights
- `coder:apikeys.manage_self` - Manage your own API keys

These composite scopes are persisted in the database and expanded during authorization, providing a more intuitive way to grant permissions compared to the granular resource:action scopes.

scripts/generate_api_key_scope_enum/main.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"sort"
 
+	"github.com/coder/coder/v2/coderd/rbac"
 	"github.com/coder/coder/v2/coderd/rbac/policy"
 )
 
@@ -18,6 +19,8 @@ func main() {
 			vals = append(vals, fmt.Sprintf("%s:%s", resource, action))
 		}
 	}
+	// Include composite coder:* scopes as first-class enum values
+	vals = append(vals, rbac.CompositeScopeNames()...)
 	sort.Strings(vals)
 	for _, v := range vals {
 		if _, ok := seen[v]; ok {