Add summary table in sample metadata summary page

[jasonzhao0307]

Currently, we used a barplot for metadata summary. We should also add a summary table where user could better understand the metadata.

[anfederico]

I have some code for this!

[anfederico]

Narrows Summary Stats
| L plot | R Plot |
Filtered Meta Table

[anfederico]

Conditional panel on the metadata plots if samples are selection

[jasonzhao0307]

Just realized we need to provide for continuous variables, the min/max value, mean/median value, and standard deviation