refactor(language-core): generate the type of slots with function property

[KazariEX]

Reference https://typescript-eslint.io/rules/method-signature-style.

It will allow us to perform more strict type checks on slots.

[pkg-pr-new]

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vue-component-meta

npm i https://pkg.pr.new/vuejs/language-tools/vue-component-meta@5173 

@vue/language-plugin-pug

npm i https://pkg.pr.new/vuejs/language-tools/@vue/language-plugin-pug@5173 

vue-component-type-helpers

npm i https://pkg.pr.new/vuejs/language-tools/vue-component-type-helpers@5173 

@vue/language-server

npm i https://pkg.pr.new/vuejs/language-tools/@vue/language-server@5173 

@vue/language-service

npm i https://pkg.pr.new/vuejs/language-tools/@vue/language-service@5173 

@vue/language-core

npm i https://pkg.pr.new/vuejs/language-tools/@vue/language-core@5173 

vue-tsc

npm i https://pkg.pr.new/vuejs/language-tools/vue-tsc@5173 

@vue/typescript-plugin

npm i https://pkg.pr.new/vuejs/language-tools/@vue/typescript-plugin@5173 

commit: 74354d5