Persistent filter feature

[HarshitDhaduk]

Used el-tag component from element-plus to make a custom tag renderer to disable close functionality (clossable tag) when a single namespace page is selected.

This is the custom-tag renderer component:

        <template #tag="{current}">
            <el-tag
                :disable-transitions="true"
                :closable="!current?.persistent" 
                @close="() => removeItem(current)"
            >
                <Label :option="current" /> 
            </el-tag>
        </template>

In removeItem function, If value passed is persistent=true. The function will return null without removing any item.

[MilosPaunovic]

I've made some changes in your approach @HarshitDhaduk, but you've made very good base. Thanks for the contribution! 🚀

Just a small note for the future, if you could use GitHub Keywords when opening PRs to connect it to the proper issue (to automate the entire process a bit more), it would be super helpful to us. You can read a bit more about it here (I've added closing keyword for this particular issue).

[HarshitDhaduk]

Thank you for the inputs @MilosPaunovic. Since this was my first PR, I am not familiar with the guidelines for contribution. Will certainly remember this next time.