feat: declare input schemas for the selector-taking agent tools

[erkamyaman]

Stacked on #1, which repairs the build. The last commit is the only one specific to this PR.

ng-devtools_highlight, _inspect-signals and _inspect-providers each advertise no parameters:

"inputSchema": { "type": "object", "properties": {} }

while all three handlers read args.selector. An MCP client has no way to discover the argument, and a wrong guess fails silently:

tools/call ng-devtools_highlight {"componentSelector": "app-root"}
-> "Highlighted `undefined` in the page overlay."

Added a raw inputSchema to each. Verified over stdio that tools/list now advertises selector as required and the handler receives it.

Used inputSchema rather than the preferred args, because args advertises positional arg0 and passes the payload through unchanged, so handlers reading args.selector would break. valibot also exposes no ~standard.jsonSchema, so args would degrade to {type: "object", additionalProperties: true} and lose the description.

Two other things I ran into while testing the MCP server, not fixed here:

• get-routes, get-components, get-signals and get-providers fail every tools/call with -32602, because they return v.array(...) and devframe advertises an object outputSchema for it. Fix submitted upstream as fix(agentic): do not advertise an output schema devframe cannot derive devframes/devframe#400.
• inspect-signals / inspect-providers always return {} rather than their "No signal graph available" fallback. my.rpc.broadcast is Promise<void> and never rejects, so the catch is unreachable. Happy to open a separate PR if you want a particular shape for it.

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