[WIP] Make more operations more agnostic about the block type

[mtfishman]

To do:

• Generalize other operations.
• Add tests.

[codecov]

Codecov Report

Attention: Patch coverage is 36.36364% with 21 lines in your changes missing coverage. Please review.

Project coverage is 7.07%. Comparing base (6be3e32) to head (0bd1cd3).

Files with missing lines	Patch %	Lines
src/blocksparsearray/blocksparsearray.jl	23.07%	10 Missing ⚠️
src/factorizations/svd.jl	0.00%	7 Missing ⚠️
src/BlockArraysExtensions/blockedunitrange.jl	50.00%	2 Missing ⚠️
src/abstractblocksparsearray/map.jl	0.00%	2 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (6be3e32) and HEAD (0bd1cd3). Click for more details.

HEAD has 6 uploads less than BASE

Flag	BASE (6be3e32)	HEAD (0bd1cd3)
	6	0

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #136       +/-   ##
==========================================
- Coverage   75.15%   7.07%   -68.09%     
==========================================
  Files          35      34        -1     
  Lines        1771    1781       +10     
==========================================
- Hits         1331     126     -1205     
- Misses        440    1655     +1215     

Flag	Coverage Δ
docs	7.07% <36.36%> (+0.63%)	⬆️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.