chore(config): trim comments across the tracked configs

[ptaranat]

fix(brew): drop deprecated homebrew/services tap

Homebrew deprecated and emptied this tap, so tapping it is now a hard
error and brew bundle fails outright:

Error: homebrew/services was deprecated. This tap is now empty

brew services moved into brew core, so nothing is lost by removing it.
This broke run_onchange_after_10-packages.sh on every apply.

chore(config): trim comments and reconcile drift

Cut prose comments across 19 files, keeping a one-line reason wherever
the 'why' was not obvious from the code. 736 -> 374 comment lines.

Largest reduction is aerospace.toml (147 -> 14): almost all of it was
upstream template boilerplate, including the 'All possible keys'
reference block and 52 commented-out alt-a..alt-z bindings.

Kept as one-liners: the brew --no-upgrade incident, the Ghostty pgrep
truncation, the Helium single-instance handoff, /etc/zshrc clobbering
history settings, and the p10k instant-prompt ordering constraint.

Also folds two local-only changes back into the source, which had
drifted because the tools write to deployed files directly:

• mise lua 5.4 (installed for luarocks)
• .gitconfig gh auth credential helper blocks

The tmux truecolor config was the third such drift, but it turned out
to already exist on fix/tmux-truecolor, so this branch is rebased onto
that one and only retrims its comments.

No functional lines changed beyond those two merges.

[ptaranat]

• chore(config): trim comments across the tracked configs #11 👈 (View in Graphite)
• fix(tmux): use tmux-256color and declare RGB per outer terminal #10
• fix(zsh): restore PATH entries orphaned by ZDOTDIR #9 : 1 other dependent PR (#12 )
• fix(zsh): set PATH in .zshenv so early .zshrc consumers resolve #8
• main

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[ptaranat]

This PR is mid-rework. The large diff below is expected and not what is being proposed.

This branch was cut before main was rewritten, so it still sits on the pre-template lineage. Retargeting its base to main makes GitHub compare across that rewrite, which is why it currently shows ~67 files. Its real content is three commits.

Two of them have been extracted and rebased onto the current main:

• 265b253 drop deprecated homebrew/services tap -> fix(brew): drop deprecated homebrew/services tap #14
• 41c02e9 global mise docs-publish task -> feat(mise): global docs-publish task for the vault site #13

The third, c2fc148 (trim comments and reconcile drift, 19 files), cannot be ported as a patch: upstream independently rewrote most of the prose it edits, so the patch would revert comments main deliberately added. The intent still stands, so this PR stays open and gets re-scoped to a fresh comment pass against the current upstream text.

Nothing here is lost. The original branch tip is tagged locally as backup/pre-rework/chore/trim-config-comments at 41c02e9.

[ptaranat]

Reworked onto the current main. This is now 23 files, +337/-876, down from the 67-file diff that came from comparing across the history rewrite.

The original commit could not be ported as a patch, since main independently rewrote most of the prose it edited. This is a fresh pass over the current text, in the same style: cut the prose, keep a one-line reason wherever the "why" is not obvious from the code. 970 -> 437 comment lines (54%).

Biggest single reduction is aerospace.toml, 147 -> 16, almost all upstream template boilerplate: the "All possible keys" reference block, the per-setting "Possible values" notes, and 52 commented-out alt-a..alt-z bindings.

Kept as one-liners: the Ghostty pgrep truncation, the Helium single-instance handoff, /etc/zshrc clobbering history settings, the p10k instant-prompt ordering constraint, the brew bundle --no-upgrade incident and its apt counterpart, the mise-before-Homebrew PATH ordering, and the cmadd note about chezmoi add flattening templates.

Two things dropped that are not prose, worth a look:

• # Status on top sat above set-option -g status-position bottom. It said the opposite of what the line does.
• Four commented-out status-left/right lines in .tmux.conf were dead config rather than explanation.

Also rewrote one comment in 11-packages-linux.sh.tmpl that used a phrase you have asked me to avoid; the meaning is unchanged.

No functional line changed. Verified per file by diffing every non-comment, non-blank line against origin/main, and separately by rendering each template and parsing the result: zsh -n, sh -n, tomllib, and loading .tmux.conf on a scratch tmux socket.

Merge note: this touches dot_zshenv.tmpl, 01-environment.zsh.tmpl, dot_tmux.conf and .chezmoidata.yaml, which #8, #9 and #10 also change. Whichever lands second needs a small rebase.