readme: showcase available feats

README.md

@@ -2,6 +2,69 @@
 
 Logic-less templates for Postgres
 
+## Roadmap
+
+- [x] interpolation
+- [x] sections
+  - [x] bools
+  - [ ] arrays
+- [ ] partials
+- [ ] inheritance
+- [ ] lambdas
+
+## Features
+
+### Variables
+
+```sql
+create or replace function win_money(you text, qt money, at timestamptz) returns text as $$
+Hello {{you}}!
+You just won {{qt}} at {{at}}.
+$$ language plmustache;
+
+postgres=# select win_money('Slonik', '12000', now());
+                         win_money
+-----------------------------------------------------------
+ Hello Slonik!                                            +
+ You just won $12,000.00 at 2023-12-04 07:44:26.915735-05.
+(1 row)
+```
+
+### Sections
+
+```sql
+create or replace function show(show bool) returns text as $$
+{{#show}}
+This is a section showing, you see?
+{{/show}}
+{{^show}}
+This is a section hiding, you see?
+{{/show}}
+$$ language plmustache;
+
+postgres=# select show(true);
+                show
+-------------------------------------
+ This is a section showing, you see?+
+
+(1 row)
+
+postgres=# select show(false);
+                show
+------------------------------------
+ This is a section hiding, you see?+
+
+(1 row)
+```
+
+## Installation
+
+Install https://gitlab.com/jobol/mustach, then on this repo:
+
+```
+$ make && make install
+```
+
 ## Development
 
 ```