feat(renovate): add renovate configuration for auto-updating toolbox version in build file of JS SDK

[SaxenaAnushka102]

Description

This PR adds the official Renovate configuration (renovate.json) to the JS SDK repository.

This configuration enables automated dependency tracking for the upstream Toolbox server:

• What it does: Uses the regexManagers to watch the googleapis/genai-toolbox releases.
• Action: This Renovate configuration uses a regexManagers block with-

• "datasourceTemplate": "github-releases"
• "depNameTemplate": "googleapis/genai-toolbox"

This tells Renovate to:

Look for new versions of the dependency by checking the GitHub Releases of the repository specified in depNameTemplate.
In this case, Renovate polls or checks for new releases/tags on https://github.com/googleapis/genai-toolbox.
The matchStrings regex extracts the current version from integration.cloudbuild.yaml. Renovate then compares this to the versions available via GitHub releases for googleapis/genai-toolbox.

• Maintenance: This eliminates the need for manual version checks and updating.

Local test results

js-sdk-renovate-logs.txt

{
             "description": "Auto-update genai-toolbox server version",
             "matchPackageNames": ["googleapis/genai-toolbox"],
             "matchManagers": ["custom.regex"],
             "branchName": "auto-update/toolbox-server-v{{newValue}}",
             "commitMessageTopic": "chore(deps): update genai-toolbox server to {{newValue}}",
             "groupName": false,
             "matchUpdateTypes": ["minor", "patch"]
           },
{
             "description": ["Auto-update genai-toolbox server version"],
             "matchPackageNames": ["googleapis/genai-toolbox"],
             "matchManagers": ["custom.regex"],
             "branchName": "auto-update/toolbox-server-v{{newValue}}",
             "commitMessageTopic": "chore(deps): update genai-toolbox server to {{newValue}}",
             "groupName": false,
             "matchUpdateTypes": ["minor", "patch"]
           },
           {
             "groupName": "js-ts-nonmajor",
             "matchCategories": ["js", "typescript"],
             "matchUpdateTypes": ["minor", "patch"]
           },
           {"groupName": "kokoro dependencies", "matchFileNames": [".kokoro/**"]}
         ],
         "ignoreDeps": ["typescript"],
         "customManagers": [
           {
             "customType": "regex",
             "managerFilePatterns": [
               "/packages/toolbox-core/integration.cloudbuild.yaml/"
             ],
             "matchStrings": [
               "_TOOLBOX_VERSION: ['\"]?(?<currentValue>v?\\d+\\.\\d+\\.\\d+)['\"]?"
             ],
             "datasourceTemplate": "github-releases",
             "depNameTemplate": "googleapis/genai-toolbox",
             "versioningTemplate": "semver",
             "packageNameTemplate": "googleapis/genai-toolbox"
           }
         ],
     },
DEBUG: findPr(auto-update/toolbox-server-v0.16.0, chore(deps): update chore(deps): update genai-toolbox server to 0.16.0 to v0.16.0, !open) (repository=SaxenaAnushka102/mcp-toolbox-sdk-js, branch=auto-update/toolbox-server-v0.16.0)

Relates issues

Resolves #109

[twishabansal]

@SaxenaAnushka102 are there any blockers to this? Can we merge this? I would be helpful in decreasing manual effort for version updates.

[SaxenaAnushka102]

@SaxenaAnushka102 are there any blockers to this? Can we merge this? I would be helpful in decreasing manual effort for version updates.

Yes @twishabansal , it's ready to be merged!