WP-5043 Improve store state error messages

[georgelesica-wf]

Problem

The message associated with the StateError that is thrown when an action subscription is managed or when the store is listened to after disposal is cryptic.

Solution

Add the runtimeType to help the situation a bit.

Potential Regressions

None.

Tests

Existing tests are sufficient, the new error message is an ergonomic issue.

QA / +10

1. CI passes

FYI

@seanburke-wf

[aviary-wf]

Raven

Number of Findings: 0

[codecov-io]

Codecov Report

Merging #109 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #109   +/-   ##
=======================================
  Coverage   90.32%   90.32%           
=======================================
  Files           5        5           
  Lines          62       62           
=======================================
  Hits           56       56           
  Misses          6        6

Impacted Files	Coverage Δ
lib/src/store.dart	90.9% <100%> (ø)	⬆️

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[seanburke-wf]

+10
CI passes

[georgelesica-wf]

@jayudey-wf you want to do the honors?

[todbachman-wf]

QA +1

• Testing instruction
• Dev +1's
• Dev/QA +10 with detail of what was tested
• Security review (if needed)
  • N/A
• Unit tests created/updated
  • N/A
• All unit tests pass
• Confirm there is a ticket in the PR title
• Rosie has run and reports properly the release the ticket will be included in
• Rosie reports a clean dependency scan

Merging into master
@Workiva/release-management-pp

[rmconsole-wf]

+1 from RM