Add filtering of tables by creation date

[jfy133]

In the sidora web-app I allow the user to filter given a 'creation' date range (e.g. if someone wanted to check how many libraries they made in a given year).

This would be good to to add to the functions here https://github.com/sidora-tools/sidora.core/blob/master/R/dataprep_filter_data.R

[nevrome]

e.g.

library(magrittr)

con <- get_pandora_connection()

df_list <- get_df_list(c(
  "TAB_Site", "TAB_Individual", "TAB_Sample", "TAB_Extract", "TAB_Library"
), con = con)

jt <- join_pandora_tables(df_list)

jt %>% filter_date("Creation_Date.Site", start = "2019-04-10", end = "2019-05-20") %$% 
  hist(Creation_Date.Site, breaks = "weeks")