Docs: Restructure configure thresholds docs (#81519)
* Removed intro text and About thresholds heading
* Added Threshold options H2 with sub-headings and moved Default thresholds to H2
* Rearranged sections and added lorem ipsum placeholder text
* Updated heading to Add a threshold, moved delete content to after task, and reformatted task
* Replaced lorem ipsum text with TBA
* Fixing UI option names
* Docs: Edit configure thresholds page (#81520)
* Added contractions
* Added Threshold value heading and updated options information
* Rewrote task
* Added Supported visualizations section, updated links, and made general copy edits
* Copy edits
* Added screenshots for some examples
* Edited intro section
* Added table, removed note, and added note about options
* Updated table and removed bullet list
* Added table of threshold examples, other copy edits
* Applied suggestions from review
* Fixed deprecation note
* Updated deprecation note
* Replaced local images with uploaded images
* Fixed deprecation note
(cherry picked from commit 5d7ed2319f)
Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>
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