feat(tools): make repo the canonical repo-identifier arg; name now an alias (#38)

Every caller (claude.ai connector, LLMs primed on gitea/GitHub) sends the repo
identifier as `repo`, but the 33 per-repo identifier tools advertised `name`.
The v0.2.8 shim aliased repo->name so it worked, yet the advertised inputSchema
still said `name` — a misleading contract, with the shim load-bearing.

- Flip all 33 identifier tools: schema property + required + struct field/tag
  from `name` to `repo`. A compliant `repo` caller now matches the struct
  directly; the shim is pure back-compat.
- normalizeAliases is now bidirectional (name<->repo), so legacy `name` callers
  still resolve, and repo_create / create_project_from_template — whose `name`
  means "name of the NEW repo", not an existing-repo id — keep `name` and still
  accept `repo`.
- `number`/`index` left as-is (out of scope; separate pre-existing quirk where
  pr_merge advertises `index` rather than `number`).
- Tests: schema-canonical assertion + flipped alias round-trip (explicit `repo`
  wins over `name`).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

internal/tools/repo_get.go

@@ -22,15 +22,15 @@ func (t *RepoGet) Descriptor() registry.ToolDescriptor {
 		Description: "Get a repo's metadata.",
 		InputSchema: json.RawMessage(`{
 			"type":"object",
-			"properties":{"owner":{"type":"string"},"name":{"type":"string"}},
-			"required":["owner","name"]
+			"properties":{"owner":{"type":"string"},"repo":{"type":"string"}},
+			"required":["owner","repo"]
 		}`),
 	}
 }
 
 type repoGetArgs struct {
 	Owner string `json:"owner"`
-	Name  string `json:"name"`
+	Repo  string `json:"repo"`
 }
 
 func (t *RepoGet) Call(ctx context.Context, raw json.RawMessage) (json.RawMessage, error) {
@@ -41,7 +41,7 @@ func (t *RepoGet) Call(ctx context.Context, raw json.RawMessage) (json.RawMessag
 	if err := t.a.Check(args.Owner); err != nil {
 		return nil, err
 	}
-	r, err := t.c.GetRepo(ctx, args.Owner, args.Name)
+	r, err := t.c.GetRepo(ctx, args.Owner, args.Repo)
 	if err != nil {
 		return nil, err
 	}