feat(gitea): add gitea-workflow human-facing router skill

Adds the human-facing entry point and router for the Gitea integration,
replacing the old flat /gitea skill per ADR 0011. It composes the six
domain skills (gitea-issues, gitea-labels-milestones, gitea-prs,
gitea-branches, gitea-files, gitea-releases) rather than calling any
Gitea MCP tool directly, mirroring git-workflow's router shape.

Preserves the old flat skill's default no-args status view (open
issues + open PRs, two sections) and adds deterministic ambiguous
issue-vs-PR number resolution via issue_read's is_pull field, since
issues and PRs share one number space in Gitea.

Authored via kyberforge:forge -> skill-author, with an independent
clean-context skill-audit re-run confirming no findings.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FNJWdVvdgvZCHi1hZGqgVQ

plugins/gitea/skills/gitea-workflow/references/sources.md

@@ -0,0 +1,33 @@
+# Sources
+
+## gitea-mcp-repo
+
+- **URL:** https://gitea.com/gitea/gitea-mcp
+- **Description:** Official gitea-mcp repository (v1.3.0) — `operation/*.go` source files documenting all 55 MCP tools. This skill's status view relies on `list_issues`/`list_pull_requests` semantics (via `gitea-issues`/`gitea-prs`), and its ambiguous-number resolution relies on `issue_read`'s `is_pull` field, both verified against this source at authoring time.
+- **Research doc:** plugins/gitea/docs/research/docs/gitea/sources.md
+- **Contributing files:** SKILL.md
+- **Status:** `extracted`
+
+## gitea-mcp-slim-go
+
+- **URL:** https://gitea.com/gitea/gitea-mcp/raw/branch/main/operation/issue/slim.go
+- **Description:** Slim response shape structs from gitea-mcp source — confirms `is_pull` is present on a single-item `issue_read` response, the field this skill's resolution step depends on to distinguish an issue from a PR sharing the same number.
+- **Research doc:** plugins/gitea/docs/research/docs/gitea/sources.md
+- **Contributing files:** SKILL.md
+- **Status:** `extracted`
+
+## context7-websites-gitea
+
+- **URL:** context7:/websites/gitea
+- **Description:** Official Gitea docs mirror on Context7 — confirms issues and pull requests share a single per-repository number sequence, and that Gitea returns 404 for permission failures rather than a distinct 403, both facts this skill's resolution and error-handling steps depend on.
+- **Research doc:** plugins/gitea/docs/research/docs/gitea/sources.md
+- **Contributing files:** SKILL.md
+- **Status:** `extracted`
+
+## context7-gitea-tea-cli
+
+- **URL:** context7:/git_gitea_com/gitea_tea
+- **Description:** Official `tea` CLI docs on Context7 — practitioner conventions for issues, PRs, and releases. Consulted as part of the shared research pass but its content is domain-specific (PR/release workflow patterns), out of scope for pure status/routing behavior — no content from it was used in this skill.
+- **Research doc:** plugins/gitea/docs/research/docs/gitea/sources.md
+- **Contributing files:** (none)
+- **Status:** `extracted`