Expose a list of supported tool names

[jamietanna]

It would be useful to have a known list of Tools that Containerbase supports, as of a given version.

Having this exposed (most likely as a JS/TS module) would allow:

• Renovate's JSON schema introducing editor completion for known Tools in constraints and postUpgradeTasks.installTools
• Strong typing to prevent attempts to reference a tool (in the Renovate codebase) that doesn't exist yet like feat(manager): add devenv manager for devenv.lock files renovatebot/renovate#40060 (comment)
• A means to generate documentation for the supported tools
• A means to provide automated updates in renovate.json for the constraints: Detect constraints and provide updates for them renovatebot/renovate#41571

This metadata we expose may also be useful to document the datasource and packageName/depNames, etc that each Tool uses.