Add runner capabilities display to web UI

- Display capabilities on runner edit page (OS, Docker, shells, tools)
- Add locale translations for capability labels
- Parse and render CapabilitiesJSON from runner model
- Update actions-proto-go to v0.5.2

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

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

go.mod

@@ -10,7 +10,7 @@ toolchain go1.25.5
 godebug x509negativeserial=1
 
 require (
-	code.gitea.io/actions-proto-go v0.4.1
+	code.gitea.io/actions-proto-go v0.5.0
 	code.gitea.io/sdk/gitea v0.22.0
 	codeberg.org/gusted/mcaptcha v0.0.0-20220723083913-4f3072e1d570
 	connectrpc.com/connect v1.18.1
@@ -313,7 +313,7 @@ replace github.com/nektos/act => gitea.com/gitea/act v0.261.7-0.20251003180512-a
 replace git.sr.ht/~mariusor/go-xsd-duration => gitea.com/gitea/go-xsd-duration v0.0.0-20220703122237-02e73435a078
 
 // Use GitCaddy fork with capability support
-replace code.gitea.io/actions-proto-go => git.marketally.com/gitcaddy/actions-proto-go v0.5.1
+replace code.gitea.io/actions-proto-go => git.marketally.com/gitcaddy/actions-proto-go v0.5.2
 
 exclude github.com/gofrs/uuid v3.2.0+incompatible