docs(api): update Deck Slots page for new features in Python API 2.16

[ecormany]

Overview

Significantly expands the Deck Slots page of the Python docs to include the concept of deck configuration introduced in PAPI 2.16 / robot software 7.1.0.

Test Plan

Check out the sandbox.

Changelog

• Update the deck map SVG to show installed staging slots on Flex.
• Add info on working area vs. staging area
• New, large section on deck configuration
  • what it is
  • subsections for each type of fixture
  • how the app handles protocol–config conflicts

Review requests

• Will this make sense to users who are approaching deck configuration for the first time?
• Will this page still work for OT-2 users who don't care about deck configuration at all?
• Do all my code snippets work? ⭐

Risk assessment

v low, docs

[codecov]

Codecov Report

Merging #14146 (9f21c89) into chore_release-7.1.0 (4ab2000) will decrease coverage by 0.04%.
The diff coverage is n/a.

Additional details and impacted files

@@                   Coverage Diff                   @@
##           chore_release-7.1.0   #14146      +/-   ##
=======================================================
- Coverage                70.46%   70.43%   -0.04%     
=======================================================
  Files                     2512     2483      -29     
  Lines                    71231    70346     -885     
  Branches                  8978     8784     -194     
=======================================================
- Hits                     50195    49545     -650     
+ Misses                   18838    18643     -195     
+ Partials                  2198     2158      -40     

Flag	Coverage Δ
g-code-testing	96.44% <ø> (ø)
notify-server	89.13% <ø> (ø)

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

Files	Coverage Δ
api/src/opentrons/protocol_api/protocol_context.py	92.30% <ø> (ø)

... and 31 files with indirect coverage changes

[jwwojak]

Left a few optional comments for consideration.

[jwwojak]

The colon here makes the sentence abrupt. What about something like this:

"This tells the robot the positions of unpowered deck fixtures, which are items that replace standard deck slots).

Or even:

"This tells the robot the positions of unpowered deck fixtures (items that replace standard deck slots).

Or 2 sentences:

"This tells the robot the positions of unpowered deck fixtures. These are items that replace standard deck slots.

[SyntaxColoring]

Huzzah.