feat(compiler-vapor): v-slot props + v-slot on component

[LittleSound]

related #154

I'll be working on the runtime for v-slot props in another PR later

Cases

<!-- v-slot on component -->
<Comp v-slot="{ foo, ...bar }">{{ foo + bar }}</Comp>
<Comp v-slot:named="props">{{ props.foo }}</Comp>

<!-- nested slots scoping -->
<Comp>
  <template #default="{ foo }">
    <Inner v-slot="{ bar }">
      {{ foo + bar + baz }}
    </Inner>
    {{ foo + bar + baz }}
  </template>
</Comp>

<!-- v-slot with v-if / v-for -->
<Comp>
  <template v-for="item in list" #[item]="{ bar }">foo</template>
</Comp>
<Comp>
  <template v-if="condition" #condition>condition slot</template>
  <template v-else-if="anotherCondition" #condition="{ foo, bar }">another condition</template>
  <template v-else #condition>else condition</template>
</Comp>

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Size Report

Bundles

File	Size	Gzip	Brotli
compiler-dom.global.prod.js	80.1 kB	28.1 kB	24.7 kB
compiler-vapor.global.prod.js	57.6 kB (+688 B)	19.6 kB (+254 B)	17.7 kB (+192 B)
runtime-dom.global.prod.js	95.1 kB	35.8 kB	32.3 kB
runtime-vapor.global.prod.js	48.3 kB	18 kB	16.5 kB
vue-vapor.global.prod.js	103 kB (+690 B)	36.1 kB (+269 B)	32.5 kB (+244 B)
vue.global.prod.js	152 kB	55.1 kB	49.3 kB

Usages

Name	Size	Gzip	Brotli
createApp	55.4 kB	21.2 kB	19.4 kB
createSSRApp	58.7 kB	22.6 kB	20.6 kB
defineCustomElement	57.7 kB	21.9 kB	20 kB
vapor	48.6 kB	18.1 kB	16.5 kB
overall	69.2 kB	26.2 kB	23.8 kB