docs: trim repeated boilerplate in git, gitea, and bin skills

Finding 13: five blocks of near-identical wording were repeated across
skills within a plugin — the gitea "resolve owner and repo" step (5
skills), the 404-masks-403 note (6 files), the manual pagination
explanation (8 files), the git plugin's main/master force-push refusal
(7 files, some with multiple internal restatements), and the bin
skills' domain-glossary/ADR paragraph (5 skills). Tightened each
instance in place — same meaning, fewer words — rather than extracting
to a shared file, which ADR-0014's one-file-per-skill install
constraint rules out. Left the three git skills' structured-result
JSON shapes alone (coupled to the separate, out-of-scope git-orchestrate
merge candidate, finding 19).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YR2CjVumUbEGWcMikcoXBD

plugins/git/skills/git-remotes/SKILL.md

@@ -10,7 +10,7 @@ description: >
   Not submodule pointers -> `git-submodules`.
 
 metadata:
-  version: "1.0.2"
+  version: "1.0.3"
   category: git
   source_keys:
     - git-scm-remote-docs
@@ -28,7 +28,7 @@ metadata:
 
 ## Step 1 — Clear the force-push gate
 
-`main` and `master` are a hard refusal: decline a force-push targeting either, whatever confirmation accompanies it, because no local approval can restore what the remote loses. On any other branch, `rtk git push --force` and `-f` run only after the caller passes `confirm: true` for that specific push — for a human caller, prompt instead of failing.
+`main`/`master` are a hard refusal: decline a force-push to either regardless of confirmation — no local approval restores what the remote loses. Elsewhere, `rtk git push --force`/`-f` run only after `confirm: true` for that specific push; for a human caller, prompt instead of failing.
 
 ## Step 2 — Dispatch