fix: Ensure generated formdata properly decamelizes its properties where applicable

[jdalrymple]

Summary

When we create form data using the createFormData command, we have forgotten that it does not have its internals decamelized like standard body arguments. This results in form data submissions having the wrong field name and eventually breaking things down the line.

This PR ensures that all the content passed to createFormdata follows a specific format:

1. keys are decamelized by default (configurable)
2. nested objects are query formatted like: key[nested_key]: value

[codecov]

Bundle Report

Changes will increase total bundle size by 146.25kB (9.53%) ⬆️⚠️, exceeding the configured threshold of 5%.

Bundle name	Size	Change
requester-utils	27.57kB	1.18kB (4.48%) ⬆️
core	1.56MB	144.86kB (10.27%) ⬆️⚠️
rest	91.29kB	68 bytes (0.07%) ⬆️
cli	7.12kB	138 bytes (1.98%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: requester-utils

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
index.cjs	246 bytes	8.13kB	3.12%
index.mjs	246 bytes	6.67kB	3.83%
index.d.cts	345 bytes	6.39kB	5.71% ⚠️
index.d.mts	345 bytes	6.39kB	5.71% ⚠️

view changes for bundle: core

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
index.d.cts	4.12kB	481.83kB	0.86%
index.d.mts	4.12kB	481.83kB	0.86%
index.cjs	68.22kB	263.82kB	34.88% ⚠️
index.mjs	68.25kB	254.57kB	36.63% ⚠️
map.json	153 bytes	73.53kB	0.21%

view changes for bundle: rest

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
index.cjs	34 bytes	19.55kB	0.17%
index.mjs	34 bytes	13.15kB	0.26%

view changes for bundle: cli

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
index.mjs	138 bytes	7.12kB	1.98%