Make "make build" behavior clearer, it is rather special case

[Groxx]

It sounded a bit too general purpose for what it actually did.

While I was at it, I rewrote some of the make-help-docs and made it easier to adjust what appears "above the fold".

[Groxx]

Docs are now:

❯ make
bins                 Build all binaries, and any fast codegen needed (does not refresh wrappers or mocks)
help                 Prints a help message showing any specially-commented targets
pr                   Redo all codegen and basic checks, to ensure your PR will be able to run tests.  Recommended before opening a github PR
-----------------------------------
build                `go build` all packages and tests (a quick compile check only, skips all other steps)
clean                Clean build products
copyright            Update copyright headers
deps                 Check for dependency updates, for things that are directly imported
deps-all             Check for all dependency updates
fmt                  Run `gofmt` / organize imports / etc
go-generate          Run `go generate` to regen mocks, enums, etc
lint                 (Re)run the linter
release              Re-generate generated code and run tests
test                 Build and run all tests locally
tidy                 `go mod tidy` all packages

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.67%. Comparing base (3248455) to head (43c1e9f).

Additional details and impacted files

see 5 files with indirect coverage changes

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