add: english singapore hrt (#652)

* add: english singapore hrt

Co-authored-by: Rinfair <contact@rinfair.moe>

content/en/docs/hrt/_index.md

@@ -0,0 +1,5 @@
+---
+title: HRT Medical Resources
+weight: 3
+collapsible: true
+---

content/en/docs/hrt/singapore/_index.md

@@ -0,0 +1,4 @@
+---
+title: Singapore
+collapsible: true
+---

content/en/docs/hrt/singapore/singapore-hrt-overview.md

@@ -0,0 +1,23 @@
+---
+title: HRT Overview
+description: Guide to getting HRT in Singapore
+slug: overview
+weight: 1
+---
+
+## The Process
+
+The main place to get HRT is [Changi General Hospital](https://www.cgh.com.sg/). Your first step depends on whether you are a singaporean as it determines if you are eligible for government subsidies.
+
+1. Polyclinic referral for subsidies *(non-singaporeans skip this step)*
+1. First visit to CGH Endocrinology
+1. Psychiatry Evaluation + Psychology Evaluation
+1. Second visit to CGH Endocrinology
+1. Obtain HRT
+
+{{<notice warning "For those below 21" >}}
+
+- 18 to 20, consent from both parents is needed before HRT can commence.
+- Below 18, NO HRT given.
+
+{{</notice>}}