Add TypeScript definition

[sindresorhus]

If anyone wants to contribute, keep this in mind:

• It should adhere to https://github.com/sindresorhus/typescript-definition-style-guide
• You should have a lot of TypeScript experience.
• The pull request should be high-quality. Not sloppy.
• Docs can be copy-pasted from the readme.

[jopemachine]

May I ask if I could take on this?

Here is my draft though I'm not sure all the interface names are enough intuitive.

I'd appreciate it if you could check and tell me if there's anything lacking.

Note:

• The descriptions of attributes of ScriptFilterItem are be copied from JSON script filter format, and the other comments were copied from alfy READMD.

• Since there is no type declarations in the cache-conf, I also typed it in here though I'm not sure this type should be here.

• I've excluded action attritube from ScriptFilterItem because it is not implemented in Alfred yet. (According to this page, it is going to be introduced in Alfred 4.5)

I appreciate for always providing and maintaining lots of awesome libraries.

[sindresorhus]

May I ask if I could take on this?

Sure, do a pull request. It's easier to give feedback directly then.

[sindresorhus]

Since there is no type declarations in the cache-conf, I also typed it in here though I'm not sure this type should be here.

Maybe do a pull request to add types to that package? Link to it here and I'll ping the maintainer to review it.

[sindresorhus]

I've excluded action attritube from ScriptFilterItem because it is not implemented in Alfred yet. (According to this page, it is going to be introduced in Alfred 4.5)

Add it commented out with a todo comment to enable it when Alfred 4.5 is out.

[jopemachine]

Thanks, I made a PR in here