chore: updates to various tools (makefile, tox, templates, docs, ...)

[5A11]

Proposed changes

This PR makes sweeping updates across the AEA framework. Amongst them:

• updates issues and PR templates
• updates GH actions in workflows to latest versions and pins to versions (instead of master)
• removes docker images submodule
• moves every tool's configurations (whee supported) into pyproject.toml and removes standalone config files
• update repo documentation markdown files (CONTRIBUTING, CODE OF CONDUCT, README, AUTHORS)
• makes significant updates to makefile commands
• updates project meta-data in pyproject.toml
• updates tox to use makefile commands

Types of changes

What types of changes does your code introduce to agents-aea?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

Put an x in the boxes that apply.

• I have read the CONTRIBUTING doc
• I am making a pull request against the develop branch (left side). Also you should start your branch off our develop.
• Lint and unit tests pass locally with my changes and CI passes too
• I have added tests that prove my fix is effective or that my feature works
• I have checked that code coverage does not decrease.
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

[codecov-commenter]

Codecov Report

Merging #2816 (fa3e58d) into develop (edb3e95) will increase coverage by 0.19%.
The diff coverage is 100.00%.

❗ Current head fa3e58d differs from pull request most recent head d0307f5. Consider uploading reports for the commit d0307f5 to get more accurate results

@@             Coverage Diff             @@
##           develop    #2816      +/-   ##
===========================================
+ Coverage    97.90%   98.10%   +0.19%     
===========================================
  Files          503      503              
  Lines        35849    35849              
===========================================
+ Hits         35098    35168      +70     
+ Misses         751      681      -70     

Flag	Coverage Δ
unittests	98.10% <100.00%> (+0.19%)	⬆️

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

Impacted Files	Coverage Δ
aea/protocols/generator/common.py	100.00% <ø> (ø)
aea/helpers/serializers.py	100.00% <100.00%> (ø)
packages/fetchai/contracts/erc1155/contract.py	100.00% <100.00%> (ø)
aea/cli/run.py	100.00% <0.00%> (+16.66%)	⬆️
aea/cli/interact.py	100.00% <0.00%> (+34.73%)	⬆️
aea/cli/launch.py	100.00% <0.00%> (+50.00%)	⬆️
aea/cli/__main__.py	100.00% <0.00%> (+100.00%)	⬆️

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[jrriehl]

Looks good!

[solarw]

Nice work!
couple of comments only

[solarw]

LGTM