[MOD - Code + Lang]: Edit NTEE Table

[Thiyaghessan]

This commit does the following:

1. Renames columns from LEVX to Level X for readability
2. Converts Levels 1 and 5 to factor variables for categorical filtering
3. Renames "LEV2-MG" to "Major Group" for readability
4. Converts LEV2-MG description to Title Case from Upper Case for readability
5. Defines custom widths for interactive table for readability
6. Edits descriptions for organizations dealing with developmental disabilities to reflect use of inclusive and equitable terminology

Additionally: Should we have a full table at the bottom of the page that is identical to the searchable table? Or can we think of a full table at the bottom that adds value beyond simply repeating the columns at the top (e.g. more detailed descriptions or additional columns with metadata regarding NTEE codes)

[lecy]

Additionally: Should we have a full table at the bottom of the page that is identical to the searchable table?

Search is only useful if someone knows what they are looking for. If they are trying to understand the taxonomy then having a full version to scroll through is more useful. They also need the full table if they want to print (a researcher wanting a paper version at their desk for reference, for example).

I can see value to both - just depends on the use case.