feat: DH-14538: Export InputEditor and added options

[bmingles]

• Exporting InputEditor from @deephaven/iris-grid
• Added optional properties className and placeholder

resolves #1397

Supporting DH-14538

[codecov]

Codecov Report

Merging #1398 (3364754) into main (c76730f) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1398      +/-   ##
==========================================
- Coverage   45.59%   45.59%   -0.01%     
==========================================
  Files         506      506              
  Lines       34976    34997      +21     
  Branches     8738     8749      +11     
==========================================
+ Hits        15947    15956       +9     
- Misses      18978    18990      +12     
  Partials       51       51              

Flag	Coverage Δ
unit	45.59% <100.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ckages/iris-grid/src/sidebar/CustomColumnInput.tsx	100.00% <ø> (ø)
packages/iris-grid/src/sidebar/InputEditor.tsx	93.44% <100.00%> (ø)

... and 7 files with indirect coverage changes