chore(trunk): add linter configs and update versions

- Add .markdownlint.yaml with prettier-friendly config
- Add .yamllint.yaml with custom rules
- Enable yamllint and markdownlint in trunk.yaml
- Update Go runtime to 1.26.0
- Update linter versions (checkov, golangci-lint2, osv-scanner, trufflehog)
- Enable pre-push and pre-commit hooks
- Update .gitignore to track .trunk/configs directory

.gitignore

@@ -14,30 +14,21 @@ data/
 debug/
 
 logs/
-log/
 
 .vscode/settings.json
 
-go.work.sum
-
 !cmd/**/
 !internal/**/
 
 todo.md
 
 .*.swp
-.aider*
 mtrace.json
 .env
 *.env
-.cursorrules
 .cursor/
-.windsurfrules
 test.Dockerfile
 
-node_modules/
-tsconfig.tsbuildinfo
-
 !agent.compose.yml
 !agent/pkg/**
 dev-data/
@@ -46,5 +37,7 @@ RELEASE_NOTES.md
 CLAUDE.md
 .kilocode/**
 
+!.trunk/configs
+
 # minified files
 **/*-min.*