Minor version bump to 0.28.0

Turn off `ld_generate_symbol_per_data_segment` (#409)

* Turn off `ld_generate_symbol_per_data_segment`

* update tests

Prevent a segment from being its own sibling (#411)

* Prevent a segment from being its own sibling

* version bump

* black

* update tests

* whoops

emit_subalign option (#402)

Add new symbol attributes (`function_owner`, `allow_reference`, `allo…

…w_be_referenced`) (#401)

* function_owner

* allow_reference and allow_be_referenced

* changelog and docs

* mypyblack

* spimdisasm

* rename

Doc updates & housekeeping (#400)

* Doc updates & housekeeping

* black

* mypy

* PR comments

* black

Fix not being able to disable `SUBALIGN` on the segment level and rem…

…ove bugged image alignment check (#399)

* Revert "Fix subalign logic, dep updates (#394)"

This reverts commit 84d428f.

* Remove subalign check from img.py

* Produce an error if the user specifies a subalign on a non top-level segment

* ld_fill_value is valid for top level segments too

* changelog

* black

* Pass parent instead

Fix some `rdata` issues (#396)

* Do a two loop pass on parse_subsegments to improve sibling assignment

* version bump

* Rewrite `ld_legacy_generation` docs

* Improve base segment detection to know what section should be considered base

* Reject pairing C sections to "auto_all" generated sections

* black

* changelog

* error out if rodata section that will be migrated is not prefixed with a dot

* change rodata migration error message

Remove include_macro_inc option (#395)

* Remove include_macro_inc

* fix test

Fix $gp calculation when addiu value is negative (#393)

* Fix $gp calculation when addiu value is negative

* black

* Use getProcessedImmediate

* Bump version to 0.25.3