Rename "special page" → "blueprint page"

[emmiegit]

As part of my general efforts using less ambiguous names like "special X", I'm renaming "special pages" to "blueprints". These are the pages like _template, _404, etc.

I also rename deepwell.toml → config.toml in install/ for consistency and better tab completion.

Thanks @Zokhoi for the name suggestion.

[Zokhoi]

I don't think "underscore page" conveys the purpose of these pages well. These are template pages, but as the word "template" is taken for the main template, I think calling them "blueprint", "format" or something along those lines might be better.

[emmiegit]

Hmm, yeah I think you're right. "Underscore page" is descriptive inasmuch as you can apply a label to the concept when you're already familiar with it from Wikidot, but not helpful for conveying it to someone for the first time.

I think "blueprint page" is a much better term, I'll switch to that.

[codecov]

Codecov Report

❌ Patch coverage is 22.72727% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 2.91%. Comparing base (fe64f96) to head (1514e04).
⚠️ Report is 4 commits behind head on develop.

Files with missing lines	Patch %	Lines
deepwell/src/services/blueprint/service.rs	0.00%	9 Missing ⚠️
deepwell/src/config/file.rs	0.00%	5 Missing ⚠️
deepwell/src/services/view/service.rs	0.00%	2 Missing ⚠️
deepwell/src/services/outdate.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #2653      +/-   ##
==========================================
- Coverage     2.91%   2.91%   -0.01%     
==========================================
  Files          159     159              
  Lines         7965    7966       +1     
==========================================
  Hits           232     232              
- Misses        7733    7734       +1     

Files with missing lines	Coverage Δ
deepwell/src/config/object.rs	0.00% <ø> (ø)
deepwell/src/services/caddy/test.rs	94.11% <100.00%> (ø)
deepwell/src/services/render/service.rs	0.00% <ø> (ø)
deepwell/src/services/outdate.rs	0.00% <0.00%> (ø)
deepwell/src/services/view/service.rs	0.00% <0.00%> (ø)
deepwell/src/config/file.rs	7.14% <0.00%> (ø)
deepwell/src/services/blueprint/service.rs	0.00% <0.00%> (ø)

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[emmiegit]

Renamed underscore -> blueprint.