Add PPL docs website exporter script

Signed-off-by: Kyle Hounslow <kylhouns@amazon.com>

Author: kylehounslow

docs/user/ppl/cmd/trendline.md

@@ -5,7 +5,7 @@
 The `trendline` command calculates moving averages of fields.
 ## Syntax  
 
-trendline [sort <[+\|-] sort-field>] [sma\|wma](number-of-datapoints, field) [as \<alias\>] [[sma\|wma](number-of-datapoints, field) [as \<alias\>]]...
+trendline [sort <[+\|-] sort-field>] \[sma\|wma\](number-of-datapoints, field) [as \<alias\>] [\[sma\|wma\](number-of-datapoints, field) [as \<alias\>]]...
 * [+\|-]: optional. The plus [+] stands for ascending order and NULL/MISSING first and a minus [-] stands for descending order and NULL/MISSING last. **Default:** ascending order and NULL/MISSING first.  
 * sort-field: mandatory when sorting is used. The field used to sort.  
 * sma\|wma: mandatory. Simple Moving Average (sma) applies equal weighting to all values, Weighted Moving Average (wma) applies greater weight to more recent values.  

docs/user/ppl/functions/cryptographic.md

@@ -4,11 +4,11 @@
 
 ### Description  
 
-Version: 3.1.0
-Usage: `md5(str)` calculates the MD5 digest and returns the value as a 32 character hex string.
-Argument type: STRING
-Return type: STRING
-Example
+Version: 3.1.0  
+Usage: `md5(str)` calculates the MD5 digest and returns the value as a 32 character hex string.  
+Argument type: STRING  
+Return type: STRING  
+Example  
 
 ```ppl
 source=people
@@ -31,11 +31,11 @@ fetched rows / total rows = 1/1
 
 ### Description  
 
-Version: 3.1.0
-Usage: `sha1(str)` returns the hex string result of SHA-1.
-Argument type: STRING
-Return type: STRING
-Example
+Version: 3.1.0  
+Usage: `sha1(str)` returns the hex string result of SHA-1.  
+Argument type: STRING  
+Return type: STRING  
+Example  
 
 ```ppl
 source=people
@@ -58,12 +58,12 @@ fetched rows / total rows = 1/1
 
 ### Description  
 
-Version: 3.1.0
-Usage: `sha2(str, numBits)` returns the hex string result of SHA-2 family of hash functions (SHA-224, SHA-256, SHA-384, and SHA-512).
-The numBits indicates the desired bit length of the result, which must have a value of 224, 256, 384, or 512.
-Argument type: STRING, INTEGER
-Return type: STRING
-Example
+Version: 3.1.0  
+Usage: `sha2(str, numBits)` returns the hex string result of SHA-2 family of hash functions (SHA-224, SHA-256, SHA-384, and SHA-512).  
+The numBits indicates the desired bit length of the result, which must have a value of 224, 256, 384, or 512.  
+Argument type: STRING, INTEGER  
+Return type: STRING  
+Example  
 
 ```ppl
 source=people

docs/user/ppl/functions/datetime.md

@@ -2,7 +2,8 @@
 
     All PPL date and time functions use the UTC time zone. Both input and output values are interpreted as UTC.
     For instance, an input timestamp literal like '2020-08-26 01:01:01' is assumed to be in UTC, and the now()
-    function also returns the current date and time in UTC.
+    function also returns the current date and time in UTC.  
+
 ## ADDDATE  
 
 ### Description  

docs/user/ppl/functions/json.md

@@ -52,12 +52,12 @@ fetched rows / total rows = 4/4
 
 ### Description  
 
-Version: 3.1.0
-Limitation: Only works when plugins.calcite.enabled=true
-Usage: `json_valid(value)` Evaluates whether a string uses valid JSON syntax. Returns TRUE if valid, FALSE if invalid. NULL input returns NULL.
-Argument type: STRING
-Return type: BOOLEAN
-Example
+Version: 3.1.0  
+Limitation: Only works when plugins.calcite.enabled=true  
+Usage: `json_valid(value)` Evaluates whether a string uses valid JSON syntax. Returns TRUE if valid, FALSE if invalid. NULL input returns NULL.  
+Argument type: STRING  
+Return type: BOOLEAN  
+Example  
 
 ```ppl
 source=people

docs/user/ppl/general/datatypes.md

@@ -1,5 +1,3 @@
-##   
-
 # Data Types  
 
 ## Overview  

docs/user/ppl/index.md

@@ -11,7 +11,7 @@ The query start with search command and then flowing a set of command delimited
 
 for example, the following query retrieve firstname and lastname from accounts if age large than 18. 
 
-```
+```ppl ignore
 source=accounts
 | where age > 18
 | fields firstname, lastname