feat: Place project_id before environments in initial meltano.yml

[WillDaSilva]

The only functional change is the addition of project_id: 00000000-0000-0000-0000-000000000000 to src/meltano/core/bundle/initialize.yml. The rest is just style/formatting changes I made while trying other approaches to solving this.

src/meltano/core/bundle/initialize.yml is only used during meltano init, and meltano init replaces the project_id with a randomly generated UUID. The reason I have a default one there is because ProjectFiles.update calls ProjectFiles._split_config_dict, which in turn calls ProjectFiles._restore_file_key_order, which re-orders keys based on how they were initially. The initial order comes from initialize.yml

I had originally tried re-ordering the CommentedMap produced by Canonical.as_canonical based on a default order in MeltanoFile, but that order was being undone by ProjectFiles._restore_file_key_order, hence the current approach.

Closes #6734

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[codecov]

Codecov Report

Merging #6756 (0ac33c1) into main (fa573a4) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #6756   +/-   ##
=======================================
  Coverage   88.56%   88.56%           
=======================================
  Files         280      280           
  Lines       20226    20222    -4     
  Branches     2002     2000    -2     
=======================================
- Hits        17913    17910    -3     
  Misses       1976     1976           
+ Partials      337      336    -1     

Impacted Files	Coverage Δ
src/meltano/core/discovery_file.py	100.00% <100.00%> (ø)
src/meltano/core/project.py	91.19% <100.00%> (ø)
src/meltano/core/setting_definition.py	89.13% <100.00%> (ø)
src/meltano/core/settings_store.py	94.56% <100.00%> (-0.05%)	⬇️
src/meltano/core/plugin_discovery_service.py	88.88% <0.00%> (+0.58%)	⬆️

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