feat: support aegir.ts config file

[SgtPooki]

also tested against ipfs-shipyard/pinning-service-compliance by running

npm run build
npm pack
mv aegir-37.0.18.tgz ~/Downloads
cd /Users/sgtpooki/code/work/protocol.ai/ipfs/pinning-service-compliance/pinning-service-compliance
npm install -S ~/Downloads/aegir-37.0.18.tgz

# converted .aegir.js to .aegir.ts, then...

> npm run test

> @ipfs-shipyard/[email protected] test
> aegir lint

[17:16:29] eslint [started]
=============

WARNING: You are currently running a version of TypeScript which is not officially supported by @typescript-eslint/typescript-estree.

You may find that it works just fine, or you may not.

SUPPORTED TYPESCRIPT VERSIONS: >=3.3.1 <4.5.0

YOUR TYPESCRIPT VERSION: 4.6.4

Please only submit bug reports when using the officially supported version.

=============
[17:16:31] eslint [completed]
[17:16:31] tsc [started]
[17:16:32] tsc [completed]

> npm run build

> @ipfs-shipyard/[email protected] build
> aegir build

[17:17:50] tsc [started]
[17:17:51] tsc [completed]
[17:17:51] esbuild [started]
[17:17:52] esbuild [completed]

[SgtPooki]

Added support for no-extension files, e.g. .aegir that attempt to load as ESM and then TS.

[SgtPooki]

pushed the new tests, but it's currently failing with the error specified above.

[SgtPooki]

closing this for now because I don't have the bandwidth to take this on