[WIP] update suggest documentation

[jeanschoenlaub]

The suggest feature UX and business logic has changed quite a bit and I thought it should be reflected in the documentation.

UX changes:

• Not a wizard anymore, suggest is now accessed via the left sidebar in catalog
  ---> Changed the text (eg. "click" -> "toggle")
  ---> Changed 2 screenshots illustrating the suggestion results.
  ---> Removed 1 screenshot of the wizard itself (removed not replaced because both the result and the inputs can now be seen in the same screenshot).

Business logic change:

• Suggestion are only for the warehouse indicated on the PO (vs before having a dropdown input to select the warehouse).
  ---> Replaced a section on multi warehouse setup with a tip on demand calculation case with a sample multi warehouse setup

Also added (even though this hasn't changed):

• 1 formula to make it clearer that the suggestions take existing stock on hand into account. It can be hard to understand for a user that Odoo suggests 0 quantities even though monthly demand > 0 if we have stock on hand.
• That the suggestion only appear for RFQ stage in the tip as its something I often forgot when dev/testing the feature.
• Changed the 2nd example to not only showcase how the factor work (120 % growth), but also how the based could be used to plan for specific a scenario (in this case a special event last year).

[robodoo]

[Felicious]

Appreciate your initiative with this PR, @jeanschoenlaub !

@jero-odoo is the content owner for the Purchase app, so feel free to tag her for review whenever it's ready! (:

[jeanschoenlaub]

Hey @jero-odoo, this is my first doecumentation PR, so please let me know if there is anything I missed / could be doing better. Thanks :).
And thanks @Felicious for the very nice base documentation, and also feel free to change wording or give me feedback as well if you'd like.

[jero-odoo]

Hi @jeanschoenlaub , This looks great! I added a few notes (mostly formatting), let me know if you have any questions.
Also, it looks like there are two images in the folder that are no longer needed in the doc (suggest-30.png and in-field.png) that should be removed. Thanks!

[jero-odoo]

Suggested change

	Once the parameters are confirmed, click :guilabel:`Add All` to add all suggestion to the
	Once the parameters are confirmed, click :guilabel:`Add All` to add all suggestions to the

[jero-odoo]

Suggested change

	on the RFQ in the *Based on* period. The *average daily demand* is this sum of out-going moves
	on the RFQ in the *Based on* period. The *average daily demand* is this sum of outgoing moves

[jero-odoo]

Since the next two sections act as an example workflow, I would add a new H2 heading here (Example Workflow), to make it clearer.

[Felicious]

That's so sweet, @jeanschoenlaub! Thank you for the compliment 😊

The writing was great, and most importantly, you followed our RST conventions and style guide, so there wasn't too much for us to do! Our team values collaborating and communicating with the R&D team that's developing the features, and we're truly grateful that you're taking the initiative to write such a detailed changelog in the PR description and updating the documentation 😊

So happy to collaborate with you and (not to sound ungrateful) we hope this won't be your last contribution to the docs repo! 😉

After applying @jero-odoo's feedback, feel free to merge after the checks pass!

@robodoo delegate=jeanschoenlaub