docs(skills): add forge-gitea, forge-github, and misc skill docs

Add deprecated forge-gitea and forge-github skill entries to the main
README, and create a new misc category for rarely used skills like
tmux-launch-agent.

README.md

@@ -21,5 +21,7 @@ A collection of agent skills (slash commands and behaviors) loaded into Steve Be
 
 - [lsp-code-analysis](common/engineering/lsp-code-analysis/SKILL.md) — Semantic code analysis via LSP. Navigate code (definitions, references, implementations), search symbols, preview refactorings, and get file outlines. Use for exploring unfamiliar codebases or performing safe refactoring.
 - [pkm-curation](common/pkm/pkm-curation/SKILL.md) — Curate an Obsidian vault — classify notes, normalize frontmatter, add wikilinks, extract atomic notes. Use when curating, batch-processing, reviewing, or doing a serendipity pick.
+- [forge-gitea](common/deprecated/forge-gitea/SKILL.md) — Use the Gitea CLI (`tea`) to interact with Gitea issues, pull requests, releases, CI, and repository state.
+- [forge-github](common/deprecated/forge-github/SKILL.md) — Use the GitHub CLI (`gh`) to interact with GitHub issues, pull requests, releases, CI, and repository state.
 - [forge-interaction](common/deprecated/forge-interaction/SKILL.md) — Use when the user wants forge work such as opening a PR, creating or listing issues, checking CI, looking at the repo, pushing a branch, publishing changes, or making a release on GitHub or Gitea. This skill now delegates to specialized skills for better predictability.
 - [forge-preferences](common/deprecated/forge-preferences/SKILL.md) — Use with forge-interaction to apply Steve's personal or project-specific GitHub/Gitea remote, CLI, issue, PR, and release preferences.

common/misc/README.md

@@ -0,0 +1,7 @@
+# Misc Skills
+
+Kept around but rarely used.
+
+## User-invoked
+
+- [tmux-launch-agent](tmux-launch-agent/SKILL.md) — Fork a new agent CLI session into a new tmux window, detected from the current agent.