docs: drafted CONTRIBUTING.md

CONTRIBUTING.md

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+# Contributing
+
+## Commit message semantic
+
+// TODO
+
+## Create a tool
+
+Create a `.vue` file in `pages/tools/[category]/[route].vue` where `[category]` correspond to the tool scope and 
+`[route]` will be the path of the file in the url (ex: `foo-bar.vue` will be accessible at it-tools.tech/foo-bar).
+
+
+Here is a template of a component 
+```vue
+<template>
+  <ToolWrapper :config="config()">
+    Hello world
+  </ToolWrapper>
+</template>
+
+<script lang="ts">
+
+import {Component} from 'nuxt-property-decorator'
+import type {ToolConfig} from '@/types/ToolConfig'
+import Tool from '~/components/Tool.vue'
+
+@Component
+export default class UuidGenerator extends Tool {
+  config(): ToolConfig {
+    return {
+      title: 'My component',
+      description: 'The description of my component',
+      icon: 'mdi-icon',
+      keywords: ['some', 'keywords', 'here']
+    }
+  }
+}
+
+</script>
+
+<style scoped lang="less">
+// Extra styling here
+</style>
+
+```