inline-mod: kill the CLI with a nicer error message

[ArmandPhilippot]

inline-mod doesn't support HMR so the Astro dev server will crash if a file is updated. Example of logs:

TypeError [ERR_INVALID_ARG_TYPE]: The "to" argument must be of type string. Received undefined
    at Module.relative (node:path:1287:5)
    at findModuleEntry (file:///project/node_modules/.pnpm/@inox-tools+inline-mod@2.0.3_vite@6.2.3_@types+node@22.13.13_/node_modules/@inox-tools/inline-mod/dist/chunk-WP5NI5SC.js:1760:35)
    at async Inspector.inspectComplex (file:///project/node_modules/.pnpm/@inox-tools+inline-mod@2.0.3_vite@6.2.3_@types+node@22.13.13_/node_modules/@inox-tools/inline-mod/dist/chunk-WP5NI5SC.js:1339:25)
    at async Inspector.unsafeInspect (file:///project/node_modules/.pnpm/@inox-tools+inline-mod@2.0.3_vite@6.2.3_@types+node@22.13.13_/node_modules/@inox-tools/inline-mod/dist/chunk-WP5NI5SC.js:1262:19)
    at async Inspector.inspect (file:///project/node_modules/.pnpm/@inox-tools+inline-mod@2.0.3_vite@6.2.3_@types+node@22.13.13_/node_modules/@inox-tools/inline-mod/dist/chunk-WP5NI5SC.js:1210:14)
    at async inspectInlineMod (file:///project/node_modules/.pnpm/@inox-tools+inline-mod@2.0.3_vite@6.2.3_@types+node@22.13.13_/node_modules/@inox-tools/inline-mod/dist/vite.js:466:20)

Node.js v22.14.0
 ELIFECYCLE  Command failed with exit code 1.

This error message is not really helpful for the consumer, so it would be nice to have a way to kill the CLI in such a case with a nicer error message (ie. the dev server must be restarted, so we're killing it).