feat: create WhatWeDo section on philosophy page

[gongtzuuuu]

Why need this change? / Root cause:

• close （曼陀號理念）曼陀號領航計畫 Section #89

Changes made:

• create WhatWeDo section on philosophy section

Test Scope / Change impact:

[kylemocode]

There is a similar section in homepage, I have two question:

1. couldn't we use the same logo ?
2. Can we make this description to some constant ? it is the same in this two section

[ChengYiLin]

There is a similar section in homepage, I have two question:

1. couldn't we use the same logo ?
2. Can we make this description to some constant ? it is the same in this two section

I agree that images can be shared.
As for the description, I don't feel strongly about whether it needs to be extracted into a constant.