Reduce decorative formatting in skill and agent files

[gringolito]

What

Convert decorative, non-load-bearing markdown formatting in skill and agent files into compact equivalents. Specifically: replace tables whose column relationships are not meaningful (i.e. they are really labeled lists rendered as tables) with compact list form, and remove redundant --- horizontal-rule dividers and gratuitous bold/italic emphasis. All semantic structure — section headers, numbered step lists, and genuinely tabular tables where column relationships matter — must be preserved unchanged.

Why

Decorative markup adds byte and token overhead without contributing meaning the model needs to process. Reducing that overhead lowers the input-token footprint for every invocation of the affected skills and agents. This is the smallest, secondary lever in the broader token-reduction initiative (markup is a small fraction of body bytes; words dominate), so it should be prioritized last among siblings. Byte/line count (via wc) serves as the explicit, model-agnostic proxy for input-token reduction, by design.

In Scope

• Skill and agent files across the repository
• Convert non-load-bearing tables (labeled lists rendered as tables) to compact list form
• Remove redundant --- horizontal-rule dividers
• Remove gratuitous bold/italic emphasis that carries no semantic meaning

Out of Scope

• Any genuinely tabular table where column relationships are load-bearing (e.g. lookup tables)
• Any semantic structure: section headers, numbered step lists
• Any workflow step, rule, gh command, or contract string — content must not change, only formatting

Acceptance Criteria

• Every touched file is measurably smaller in bytes and/or lines, confirmed via wc before and after.
• Every genuinely tabular table (load-bearing column relationships) is preserved as a table; only non-tabular labeled-list tables are converted. Confirmed by diff review.
• No semantic structure is removed (headers, numbered steps) and no workflow step, rule, gh command, or contract string is altered. Confirmed by diff review.

INVEST Notes

Verification is diff-review-only — no skill-behavior test harness exists (initiative-wide decision). No fixed byte-reduction target; "measurably smaller" via wc is sufficient, by explicit decision.