Add support for TinyMCE

[rthrash]

Should be able to select text and use modAI to perform various actions:

• proofread/spellcheck
• length (shorten, lengthen, target word count)
• change tone
• change style
• translate (reasearch into which languages work best tbd … but at least English (us), English (uk), Dutch, French, German, Spanish, Portuguese (br)…)

Tones
Formal
Informal
Persuasive
Inspirational
Conversational
Humorous
Sarcastic
Descriptive
Didactic
Emotional
Assertive
Optimistic

Styles
Business
Technical
Journalism
Medical
Scientific
Academic
AP Style Manual
Chicago Style Manual
David Ogilvy
Ernest Hemingway

Potential prompt menu

Proofread → Proofread and fix any spelling or grammar mistakes
Clarify → Improve this copy to eliminate unclear thoughts or awkward phrasing
Reading level → Rewrite this for a ______ reading level (Elementary School, Middle School, High School, College, PhD)
Copy length → see below (Adjust word count, Adjust sentences, Adjust paragraphs, Arbitrary length instructions)
Change tone → Rewrite this with a _________ tone (submenu with target tones from above)
Change style → Rewrite this in the style of ___________ (submenu with target styles from above)
Translate → Translate this to __________ (submenu with target languages)

The length could be interesting. It would be useful to know how many words are currently selected, then have a text input for the number of target words. You might also want to add a number of sentences or paragraphs, or to cut it down to a certain number of sentences and paragraphs.